21491

Number 21491 is an odd five-digits prime number and natural number following 21490 and preceding 21492.

Properties of the number 21491

Nominal	21491
Cardinal	twenty-one thousand four hundred ninety-one
Cardinal twenty-one thousand four hundred ninety-one
Ordinal	21,491st
Number of digits	5
Sum of digits	17
Product of digits	72
Number parity	Odd

Previous number is 21490

Next number is 21492

Calculation was done in 0.0000350475 seconds

Prime Factorization of 21491

Prime factorization	21491
Prime factors	21491
Number of distinct prime factors ω(n)	1
Total number of prime factors Ω(n)	1
Sum of prime factors	21491
Product of prime factors	21491

Calculation was done in 0.0009670258 seconds

Divisors of 21491

List of proper divisors	1
List of all dividers	1, 21491
Number of divisors d(n)	2
Sum of all divisors σ(n)	21492
Aliquot sum	1
21491 is a deficient number , since it is larger than the sum of its proper divisors (1). Its deficiency is 21490.

Calculation was done in 0.0000188351 seconds

Prime numbers

Is 21491 a prime number?	Yes
Is 21491 a semiprime number?	No
Is 21491 a Chen prime number?	Yes
Is 21491 a Mersenne prime number?	No

Previous prime is 21487

Next prime is 21493

Calculation was done in 0.0814549923 seconds

Sequences

Is 21491 a Catalan number?	No
Is 21491 a Fibonacci number?	No
Is 21491 a Idoneal number?	No

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Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.

21491 is a Happy number

21491 is not a Humble number

21491 is not a Münchhausen number

21491 is not a Perfect number

21491 is not a Perfect square

21491 is not a Palindrome

Calculation was done in 0.0014281273 seconds

Numeric Bases of 21491

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.

Base	System	Value
2	Binary	101001111110011₂
3	Ternary	1002110222₃
4	Quaternary	11033303₄
5	Quinary	1141431₅
6	Senary	243255₆
7	Septenary	116441₇
8	Octal	51763₈
9	Nonary	32428₉
10	Decimal	21491
12	Duodecimal	1052b₁₂
16	Hexadecimal	53f3₁₆
20	Vigesimal	2deb₂₀
36	Base36	gkz₃₆
60	Sexagesimal	5wB₆₀

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Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.

Square of 21491 (n²)	461863081
Cube of 21491 (n³)	9925899473771
Square root of 21491	146.59809002849
Natural Logarithm (ln) of 21491	9.9753895218252
Decimal Logarithm (log) of 21491	4.3322566241642

Calculation was done in 0.0000050068 seconds

Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.

Sine of 21491	0.59345378628083
Cosecant of 21491	1.685051175201
Cosine of 21491	-0.80486806592692
Secant of 21491	-1.2424396523278
Tangent of 21491	-0.73733051589938
Cotangent of 21491	-1.3562438803719

Calculation was done in 0.0000150204 seconds

Number parity

Parity is the property of an integer of whether it is even or odd.

Is 21491 an Even Number?

Is 21491 an Odd Number?

Yes, the number 21491 is an odd number.

Total number of all odd numbers from 1 to 21491 is 10746

Sum of all the odd numbers from 1 to 21491 are 115476516

The sum of all odd numbers is a perfect square: 115476516 = 10746

An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.

Previous odd number is 21489

Next odd number is 21493

Calculation was done in 0.0000050068 seconds

Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".

The spelling of 21491 in words is "twenty-one thousand four hundred ninety-one", meaning that:

21491 is not an aban number (as it contains the letter a)

21491 is not an eban number (as it contains the letter e)

21491 is not an iban number (as it contains the letter i)

21491 is not an oban number (as it contains the letter o)

21491 is not a tban number (as it contains the letter t)

21491 is not an uban number (as it contains the letter u)

Calculation was done in 0.0000019073 seconds

Numeral systems

How to write 21491 in other number systems?

Bengali numerals	২১৪৯১
Eastern Arabic numerals	٢١٬٤٩١
Hieroglyphs numeralsused in Ancient Egypt	𓂭𓂭𓆼𓍥𓎎𓏺
Khmer numerals	២១៤៩១
Japanese numerals	二万千四百九十一
Roman numerals	n/a
Thai numerals	๒๑๔๙๑

Calculation was done in 0.0001409054 seconds

Translation

How do you say 21491 in 38 different languages?

Arabic	واحد و عشرون ألف و أربعة مائة و واحد و تسعون
Croatian	dvadeset i jedna tisuća četiristo devedeset i jedan
Czech	dvacet jedna tisíc čtyři sta devadesát jeden
Danish	en og tyve tusinde fire hundrede en og halvfems
Dutch	éénentwintigduizend vierhonderdéénennegentig
Estonian	akpe blaeve vɔ ɖekɛ alafa ene blaasieke vɔ ɖekɛ
Faroese	tjúgoeitt tusin og fýrehundraðognítiein
Filipino	dalawáng pû’t isáng libó’t ápat na daán at siyám na pû’t isá
Finnish	kaksikymmentäyksituhattaneljäsataayhdeksänkymmentäyksi
French	vingt et un mille quatre cent quatre-vingt-onze
Greek	είκοσι μία χίλιάδες τετρακόσια εννενήντα ένα
German	einundzwanzigtausendvierhunderteinundneunzig
Hebrew	עשרים ואחד אלף ארבע מאות תשעים ואחת
Hindi	इक्कीस हज़ार चार सौ इक्यानबे
Hungarian	huszonegyezernégyszázkilencvenegy
Icelandic	tuttugu og eitt þúsund og fjögurhundrað og níutíu og einn
Indonesian	dua puluh satu ribu empat ratus sembilan puluh satu
Italian	ventunomilaquattrocentonovantuno
Japanese	二万千四百九十一
Korean	이만 천사백구십일
Latvian	divdesmit viens tūkstoši četrsimt deviņdesmit viens
Lithuanian	dvidešimt vienas tūkstantis keturi šimtai devyniasdešimt vienas
Norwegian	tjueett tusen fire hundre og nittién
Persian	بیست و یک هزار و چهارصد و نود و یک
Polish	dwadzieścia jeden tysięcy czterysta dziewięćdziesiąt jeden
Portuguese	vinte e um mil quatrocentos e noventa e um
Romanian	douăzeci şi una mii patru sute nouăzeci şi unu
Russian	двадцать одна тысяча четыреста девяносто один
Serbian	двадесет и једна хиљада четиристо деведесет и један
Slovak	dvadsaťjedna tisíc štyristo deväťdesiatjeden
Slovene	dvaset ena tisuću štiristo devetdeset ena
Spanish	veintiún mil cuatrocientos noventa y uno
Swahili	elfu ishirini na moja, mia nne na tisini na moja
Swedish	tjugoentusenfyrahundranittioen
Thai	สองหมื่นหนึ่งพันสี่ร้อยเก้าสิบเอ็ด
Turkish	yirmi bir bin dört yüz doksan bir
Ukrainian	двадцять одна тисяча чотириста девʼяносто один
Vietnamese	hai mươi mốt nghìn bốn trăm chín mươi mốt

Calculation was done in 0.0142850876 seconds

Miscellaneous

Number 21491 reversed	19412
Unicode Character	U+53F3	右
Unix Timestamp	Thu, 01 Jan 1970 05:58:11 +0000

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