| Nominal | 21280 |
| Cardinal | twenty-one thousand two hundred eighty |
Cardinal twenty-one thousand two hundred eighty | |
| Ordinal | 21,280th |
| Number of digits | 5 |
| Sum of digits | 13 |
| Product of digits | 0 |
| Number parity | Even |
| Prime factorization | 2 x 2 x 2 x 2 x 2 x 5 x 7 x 19 |
| Prime factorization in exponent form | 25 x 5 x 7 x 19 |
| Prime factors | 2, 5, 7, 19 |
| Number of distinct prime factors ω(n) | 4 |
| Total number of prime factors Ω(n) | 8 |
| Sum of prime factors | 33 |
| Product of prime factors | 1330 |
| Is 21280 a prime number? | No |
| Is 21280 a semiprime number? | No |
| Is 21280 a Chen prime number? | No |
| Is 21280 a Mersenne prime number? | No |
| Is 21280 a Catalan number? | No |
| Is 21280 a Fibonacci number? | No |
| Is 21280 a Idoneal number? | No |
| Square of 21280 (n2) | 452838400 |
| Cube of 21280 (n3) | 9636401152000 |
| Square root of 21280 | 145.87666023048 |
| Natural Logarithm (ln) of 21280 | 9.9655229434556 |
| Decimal Logarithm (log) of 21280 | 4.327971623623 |
| Sine of 21280 | -0.91220567569956 |
| Cosecant of 21280 | -1.0962440013686 |
| Cosine of 21280 | 0.40973260209741 |
| Secant of 21280 | 2.4406161356969 |
| Tangent of 21280 | -2.2263438911866 |
| Cotangent of 21280 | -0.44916690721441 |
| The spelling of 21280 in words is "twenty-one thousand two hundred eighty", meaning that: |
| 21280 is not an aban number (as it contains the letter a) |
| 21280 is not an eban number (as it contains the letter e) |
| 21280 is not an iban number (as it contains the letter i) |
| 21280 is not an oban number (as it contains the letter o) |
| 21280 is not a tban number (as it contains the letter t) |
| 21280 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২১২৮০ |
| Eastern Arabic numerals | ٢١٬٢٨٠ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓍣𓎍 |
| Khmer numerals | ២១២៨០ |
| Japanese numerals | 二万千二百八十 |
| Roman numerals | n/a |
| Thai numerals | ๒๑๒๘๐ |
| Arabic | واحد و عشرون ألف و مائتان و ثمانون |
| Croatian | dvadeset i jedna tisuća dvjesto osamdeset |
| Czech | dvacet jedna tisíc dvě stě osmdesát |
| Danish | en og tyve tusinde to hundrede firs |
| Dutch | éénentwintigduizend tweehonderdtachtig |
| Estonian | akpe blaeve vɔ ɖekɛ alafa eve kple blaenyi |
| Faroese | tjúgoeitt tusin og tveyhundraðogáttati |
| Filipino | dalawáng pû’t isáng libó’t dalawáng daán at walóng pû |
| Finnish | kaksikymmentäyksituhattakaksisataakahdeksankymmentä |
| French | vingt et un mille deux cent quatre-vingts |
| Greek | είκοσι μία χίλιάδες διακόσια ογδόντα |
| German | einundzwanzigtausendzweihundertachtzig |
| Hebrew | עשרים ואחד אלף מאתיים שמונים |
| Hindi | इक्कीस हज़ार दो सौ अस्सी |
| Hungarian | huszonegyezerkétszáznyolcvan |
| Icelandic | tuttugu og eitt þúsund og tvöhundrað og áttatíu |
| Indonesian | dua puluh satu ribu dua ratus delapan puluh |
| Italian | ventunomiladuecentoottanta |
| Japanese | 二万千二百八十 |
| Korean | 이만 천이백팔십 |
| Latvian | divdesmit viens tūkstoši divsimt astoņdesmit |
| Lithuanian | dvidešimt vienas tūkstantis du šimtai aštuoniasdešimt |
| Norwegian | tjueett tusen to hundre og åtti |
| Persian | بیست و یک هزار و دویست و هشتاد |
| Polish | dwadzieścia jeden tysięcy dwieście osiemdziesiąt |
| Portuguese | vinte e um mil duzentos e oitenta |
| Romanian | douăzeci şi una mii două sute optzeci |
| Russian | двадцать одна тысяча двести восемьдесят |
| Serbian | двадесет и једна хиљада двеста осамдесет |
| Slovak | dvadsaťjedna tisíc dvesto osemdesiat |
| Slovene | dvaset ena tisuću dvjesto osemdeset |
| Spanish | veintiún mil doscientos ochenta |
| Swahili | elfu ishirini na moja, mia mbili na themanini |
| Swedish | tjugoentusentvåhundraåttio |
| Thai | สองหมื่นหนึ่งพันสองร้อยแปดสิบ |
| Turkish | yirmi bir bin iki yüz seksen |
| Ukrainian | двадцять одна тисяча двісті вісімдесят |
| Vietnamese | hai mươi mốt nghìn hai trăm tám mươi |
| Number 21280 reversed | 08212 | |
| Unicode Character | U+5320 | 匠 |
| Unix Timestamp | Thu, 01 Jan 1970 05:54:40 +0000 | |