| Nominal | 12981 |
| Cardinal | twelve thousand nine hundred eighty-one |
Cardinal twelve thousand nine hundred eighty-one | |
| Ordinal | 12,981st |
| Number of digits | 5 |
| Sum of digits | 21 |
| Product of digits | 144 |
| Number parity | Odd |
| Prime factorization | 3 x 4327 |
| Prime factors | 3, 4327 |
| Number of distinct prime factors ω(n) | 2 |
| Total number of prime factors Ω(n) | 2 |
| Sum of prime factors | 4330 |
| Product of prime factors | 12981 |
| Is 12981 a prime number? | No |
| Is 12981 a semiprime number? | Yes |
| Is 12981 a Chen prime number? | No |
| Is 12981 a Mersenne prime number? | No |
| Is 12981 a Catalan number? | No |
| Is 12981 a Fibonacci number? | No |
| Is 12981 a Idoneal number? | No |
| Square of 12981 (n2) | 168506361 |
| Cube of 12981 (n3) | 2187381072141 |
| Square root of 12981 | 113.93419153178 |
| Natural Logarithm (ln) of 12981 | 9.471242028893 |
| Decimal Logarithm (log) of 12981 | 4.1133081499184 |
| Sine of 12981 | -0.060807098132152 |
| Cosecant of 12981 | -16.44544848739 |
| Cosine of 12981 | 0.99814953630042 |
| Secant of 12981 | 1.0018538942636 |
| Tangent of 12981 | -0.060919828062566 |
| Cotangent of 12981 | -16.415016781941 |
| The spelling of 12981 in words is "twelve thousand nine hundred eighty-one", meaning that: |
| 12981 is not an aban number (as it contains the letter a) |
| 12981 is not an eban number (as it contains the letter e) |
| 12981 is not an iban number (as it contains the letter i) |
| 12981 is not an oban number (as it contains the letter o) |
| 12981 is not a tban number (as it contains the letter t) |
| 12981 is not an uban number (as it contains the letter u) |
| Bengali numerals | ১২৯৮১ |
| Eastern Arabic numerals | ١٢٬٩٨١ |
| Hieroglyphs numeralsused in Ancient Egypt | 𓂭𓆼𓆼𓍪𓎍𓏺 |
| Khmer numerals | ១២៩៨១ |
| Japanese numerals | 一万二千九百八十一 |
| Roman numerals | n/a |
| Thai numerals | ๑๒๙๘๑ |
| Arabic | إثنا عشر ألف و تسعة مائة و واحد و ثمانون |
| Croatian | dvanaest tisuća devetsto osamdeset i jedan |
| Czech | dvanáct tisíc devět set osmdesát jeden |
| Danish | tolv tusinde ni hundrede en og firs |
| Dutch | twaalfduizend negenhonderdéénentachtig |
| Estonian | akpe wuieve alafa asieke blaenyi vɔ ɖekɛ |
| Faroese | tólv tusin og níggjuhundraðogáttatiein |
| Filipino | labíng-dalawáng libó’t siyám na daán at walóng pû’t isá |
| Finnish | kaksitoistatuhattayhdeksänsataakahdeksankymmentäyksi |
| French | douze mille neuf cent quatre-vingt-un |
| Greek | δώδεκα χίλιάδες εννιακόσια ογδόντα ένα |
| German | zwölftausendneunhunderteinundachtzig |
| Hebrew | שניים עשר אלף תשע מאות שמונים ואחת |
| Hindi | बारह हज़ार नौ सौ इक्यासी |
| Hungarian | tizenkettőezerkilencszáznyolcvanegy |
| Icelandic | tólf þúsund og níuhundrað og áttatíu og einn |
| Indonesian | dua belas ribu sembilan ratus delapan puluh satu |
| Italian | dodicimilanovecentoottantuno |
| Japanese | 一万二千九百八十一 |
| Korean | 만 이천구백팔십일 |
| Latvian | divpadsmit tūkstoši deviņsimt astoņdesmit viens |
| Lithuanian | dvylika tūkstančių devyni šimtai aštuoniasdešimt vienas |
| Norwegian | tolv tusen ni hundre og åttién |
| Persian | دوازده هزار و نهصد و هشتاد و یک |
| Polish | dwanaście tysięcy dziewięćset osiemdziesiąt jeden |
| Portuguese | doze mil novecentos e oitenta e um |
| Romanian | douăsprezece mii nouă sute optzeci şi unu |
| Russian | двенадцать тысяч девятьсот восемьдесят один |
| Serbian | дванаест хиљада деветсто осамдесет и један |
| Slovak | dvanásť tisíc deväťsto osemdesiatjeden |
| Slovene | dvanajst tisuću devetsto osemdeset ena |
| Spanish | doce mil novecientos ochenta y uno |
| Swahili | elfu kumi na mbili, mia tisa na themanini na moja |
| Swedish | tolvtusenniohundraåttioen |
| Thai | หนึ่งหมื่นสองพันเก้าร้อยแปดสิบเอ็ด |
| Turkish | on iki bin dokuz yüz seksen bir |
| Ukrainian | дванадцять тисяч девʼятсот вісімдесят один |
| Vietnamese | mười hai nghìn chín trăm tám mươi mốt |
| Number 12981 reversed | 18921 | |
| Unicode Character | U+32B5 | ㊵ |
| Unix Timestamp | Thu, 01 Jan 1970 03:36:21 +0000 | |