| Nominal | 21145 |
| Cardinal | twenty-one thousand one hundred forty-five |
Cardinal twenty-one thousand one hundred forty-five | |
| Ordinal | 21,145th |
| Number of digits | 5 |
| Sum of digits | 13 |
| Product of digits | 40 |
| Number parity | Odd |
| Prime factorization | 5 x 4229 |
| Prime factors | 5, 4229 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 4234 |
| Product of prime factors | 21145 |
| Is 21145 a prime number? | No |
| Is 21145 a semiprime number? | Yes |
| Is 21145 a Chen prime number? | No |
| Is 21145 a Mersenne prime number? | No |
| Is 21145 a Catalan number? | No |
| Is 21145 a Fibonacci number? | No |
| Is 21145 a Idoneal number? | No |
| Square of 21145 (n2) | 447111025 |
| Cube of 21145 (n3) | 9454162623625 |
| Square root of 21145 | 145.41320435229 |
| Natural Logarithm (ln) of 21145 | 9.9591587499066 |
| Decimal Logarithm (log) of 21145 | 4.3252076894829 |
| Sine of 21145 | 0.87242944500975 |
| Cosecant of 21145 | 1.1462244949663 |
| Cosine of 21145 | -0.48874007762815 |
| Secant of 21145 | -2.0460773441232 |
| Tangent of 21145 | -1.7850581217805 |
| Cotangent of 21145 | -0.5602058486491 |
| The spelling of 21145 in words is "twenty-one thousand one hundred forty-five", meaning that: |
| 21145 is not an aban number (as it contains the letter a) |
| 21145 is not an eban number (as it contains the letter e) |
| 21145 is not an iban number (as it contains the letter i) |
| 21145 is not an oban number (as it contains the letter o) |
| 21145 is not a tban number (as it contains the letter t) |
| 21145 is not an uban number (as it contains the letter u) |
| Bengali numerals | ২১১৪৫ |
| Eastern Arabic numerals | ٢١٬١٤٥ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓂭𓆼𓍢𓎉𓏾 |
| Khmer numerals | ២១១៤៥ |
| Japanese numerals | 二万千百四十五 |
| Roman numerals | n/a |
| Thai numerals | ๒๑๑๔๕ |
| Arabic | واحد و عشرون ألف و مائة و خمسة و أربعون |
| Croatian | dvadeset i jedna tisuća sto četrdeset i pet |
| Czech | dvacet jedna tisíc sto čtyřicet pět |
| Danish | en og tyve tusinde et hundrede fem og fyrre |
| Dutch | éénentwintigduizend honderdvijfenveertig |
| Estonian | akpe blaeve vɔ ɖekɛ alafa ɖeka blaene vɔ atɔ̃ |
| Faroese | tjúgoeitt tusin og eitthundraðogfýratifimm |
| Filipino | dalawáng pû’t isáng libó’t isáng daán at ápat na pû’t limá |
| Finnish | kaksikymmentäyksituhattasataneljäkymmentäviisi |
| French | vingt et un mille cent quarante-cinq |
| Greek | είκοσι μία χίλιάδες εκατόν σαράντα πέντε |
| German | einundzwanzigtausendeinhundertfünfundvierzig |
| Hebrew | עשרים ואחד אלף מאה ארבעים וחמש |
| Hindi | इक्कीस हज़ार एक सौ पैंतालीस |
| Hungarian | huszonegyezerszáznegyvenöt |
| Icelandic | tuttugu og eitt þúsund og eitthundrað og fjörutíu og fimm |
| Indonesian | dua puluh satu ribu seratus empat puluh lima |
| Italian | ventunomilacentoquarantacinque |
| Japanese | 二万千百四十五 |
| Korean | 이만 천백사십오 |
| Latvian | divdesmit viens tūkstoši simt četrdesmit pieci |
| Lithuanian | dvidešimt vienas tūkstantis šimtas keturiasdešimt penki |
| Norwegian | tjueett tusen hundre og førtifem |
| Persian | بیست و یک هزار و صد و چهل و پنج |
| Polish | dwadzieścia jeden tysięcy sto czterdzieści pięć |
| Portuguese | vinte e um mil cento e quarenta e cinco |
| Romanian | douăzeci şi una mii una sută patruzeci şi cinci |
| Russian | двадцать одна тысяча сто сорок пять |
| Serbian | двадесет и једна хиљада сто четрдесет и пет |
| Slovak | dvadsaťjedna tisíc jednasto štyridsaťpäť |
| Slovene | dvaset ena tisuću sto štirideset pet |
| Spanish | veintiún mil ciento cuarenta y cinco |
| Swahili | elfu ishirini na moja, mia moja na arobaini na tano |
| Swedish | tjugoentusenenhundrafyrtiofem |
| Thai | สองหมื่นหนึ่งพันหนึ่งร้อยสี่สิบห้า |
| Turkish | yirmi bir bin yüz kırk beş |
| Ukrainian | двадцять одна тисяча сто сорок пʼять |
| Vietnamese | hai mươi mốt nghìn một trăm bốn mươi lăm |
| Number 21145 reversed | 54112 | |
| Unicode Character | U+5299 | 劙 |
| Unix Timestamp | Thu, 01 Jan 1970 05:52:25 +0000 | |