| Nominal | 13681 |
| Cardinal | thirteen thousand six hundred eighty-one |
Cardinal thirteen thousand six hundred eighty-one | |
| Ordinal | 13,681st |
| Number of digits | 5 |
| Sum of digits | 19 |
| Product of digits | 144 |
| Number parity | Odd |
| Prime factorization | 13681 |
| Prime factors | 13681 |
| Number of distinct prime factors ω(n) | 1 |
| Total number of prime factors Ω(n) | 1 |
| Sum of prime factors | 13681 |
| Product of prime factors | 13681 |
| Is 13681 a prime number? | Yes |
| Is 13681 a semiprime number? | No |
| Is 13681 a Chen prime number? | Yes |
| Is 13681 a Mersenne prime number? | No |
| Is 13681 a Catalan number? | No |
| Is 13681 a Fibonacci number? | No |
| Is 13681 a Idoneal number? | No |
| Square of 13681 (n2) | 187169761 |
| Cube of 13681 (n3) | 2560669500241 |
| Square root of 13681 | 116.96580696939 |
| Natural Logarithm (ln) of 13681 | 9.5237632879201 |
| Decimal Logarithm (log) of 13681 | 4.1361178428965 |
| Sine of 13681 | 0.59398742474319 |
| Cosecant of 13681 | 1.6835373247714 |
| Cosine of 13681 | -0.80447432479039 |
| Secant of 13681 | -1.2430477507913 |
| Tangent of 13681 | -0.73835473232532 |
| Cotangent of 13681 | -1.3543625526049 |
| The spelling of 13681 in words is "thirteen thousand six hundred eighty-one", meaning that: |
| 13681 is not an aban number (as it contains the letter a) |
| 13681 is not an eban number (as it contains the letter e) |
| 13681 is not an iban number (as it contains the letter i) |
| 13681 is not an oban number (as it contains the letter o) |
| 13681 is not a tban number (as it contains the letter t) |
| 13681 is not an uban number (as it contains the letter u) |
| Bengali numerals | ১৩৬৮১ |
| Eastern Arabic numerals | ١٣٬٦٨١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓆼𓆼𓆼𓍧𓎍𓏺 |
| Khmer numerals | ១៣៦៨១ |
| Japanese numerals | 一万三千六百八十一 |
| Roman numerals | n/a |
| Thai numerals | ๑๓๖๘๑ |
| Arabic | ثلاثة عشر ألف و ستة مائة و واحد و ثمانون |
| Croatian | trinaest tisuća šeststo osamdeset i jedan |
| Czech | třináct tisíc šest set osmdesát jeden |
| Danish | tretten tusinde seks hundrede en og firs |
| Dutch | dertienduizend zeshonderdéénentachtig |
| Estonian | akpe wuietɔ̃ alafa ade blaenyi vɔ ɖekɛ |
| Faroese | trettan tusin og sekshundraðogáttatiein |
| Filipino | labíng-tatlóng libó’t anim na daán at walóng pû’t isá |
| Finnish | kolmetoistatuhattakuusisataakahdeksankymmentäyksi |
| French | treize mille six cent quatre-vingt-un |
| Greek | δεκατρεις χίλιάδες εξακόσια ογδόντα ένα |
| German | dreizehntausendsechshunderteinundachtzig |
| Hebrew | שלושה עשר אלף שש מאות שמונים ואחת |
| Hindi | तेरह हज़ार छह सौ इक्यासी |
| Hungarian | tizenháromezerhatszáznyolcvanegy |
| Icelandic | þrettán þúsund og sexhundrað og áttatíu og einn |
| Indonesian | tiga belas ribu enam ratus delapan puluh satu |
| Italian | tredicimilaseicentoottantuno |
| Japanese | 一万三千六百八十一 |
| Korean | 만 삼천육백팔십일 |
| Latvian | trīspadsmit tūkstoši sešsimt astoņdesmit viens |
| Lithuanian | trylika tūkstančių šeši šimtai aštuoniasdešimt vienas |
| Norwegian | tretten tusen seks hundre og åttién |
| Persian | سیزده هزار و ششصد و هشتاد و یک |
| Polish | trzynaście tysięcy sześćset osiemdziesiąt jeden |
| Portuguese | treze mil seiscentos e oitenta e um |
| Romanian | treisprezece mii şase sute optzeci şi unu |
| Russian | тринадцать тысяч шестьсот восемьдесят один |
| Serbian | тринаест хиљада шестсто осамдесет и један |
| Slovak | trinásť tisíc šesťsto osemdesiatjeden |
| Slovene | trinajst tisuću šesto osemdeset ena |
| Spanish | trece mil seiscientos ochenta y uno |
| Swahili | elfu kumi na tatu, mia sita na themanini na moja |
| Swedish | trettontusensexhundraåttioen |
| Thai | หนึ่งหมื่นสามพันหกร้อยแปดสิบเอ็ด |
| Turkish | on üç bin altı yüz seksen bir |
| Ukrainian | тринадцять тисяч шістсот вісімдесят один |
| Vietnamese | mười ba nghìn sáu trăm tám mươi mốt |
| Number 13681 reversed | 18631 | |
| Unicode Character | U+3571 | 㕱 |
| Unix Timestamp | Thu, 01 Jan 1970 03:48:01 +0000 | |