Names of 3981
| Nominal | 3981 |
| Cardinal | three thousand nine hundred eighty-one |
| Ordinal | 3,981st |
| This number as US currency | three thousand nine hundred eighty-one dollars |
| Is 3981 an odd number? | 3981 is an odd number |
| Is 3981 an even number? | 3981 is NOT an even number |
| Is 3981 a palindrome? | 3981 is NOT a palindrome number |
| Is 3981 a triangle number? | 3981 is NOT a triangle number |
3981 in other Bases
| Base 2 (Binary) | 1111100011012 |
| Base 3 (Ternary) | 121101103 |
| Base 4 (Quaternary) | 3320314 |
| Base 5 (Quinary) | 1114115 |
| Base 6 (Senary) | 302336 |
| Base 8 (Octal) | 76158 |
| Base 12 (Duodecimal) | 237912 |
| Base 16 (Hexadecimal) | F8D16 |
| Base 20 (Vigesimal) | 9J120 |
Primes and Factors tests for 3981
| Is 3981 a Prime Number? | 3981 is NOT a prime |
| Is 3981 a perfect number? | 3981 is NOT a perfect number |
| Is 3981 a Mersenne Prime? | 3981 is NOT a Mersenne prime |
| Is 3981 a Fermat Prime? | 3981 is NOT a Fermat prime |
| Is 3981 a Fibonacci Prime? | 3981 is NOT a Fibonacci prime |
| Is 3981 a Partition Prime? | 3981 is NOT a Partition prime |
| Is 3981 a Pell Prime? | 3981 is NOT a Pell prime |
| Prime Factors | Prime factors of 3981 |
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3981 in other Numerals
| 3981 in Roman Numeral | MMMCMLXXXI |
| 3981 in Chinese Numeral | 叄仟玖佰捌拾壹 |
| 3981 in Egyptian Numeral | 𓆾𓍪𓎍𓏺 |
| 3981 in Babylonian Numeral |    |
Roots and stuff for 3981
| Is 3981 a square number? | 3981 is NOT a square number |
| Is 3981 a cube number? | 3981 is NOT a cube number |
| Square root of the number 3981 | 63.095166217389 |
| Cube root of the number 3981 | 15.848836769081 |
Recreational math for 3981
| Number 3981 reversed | 1893 |
| Sum of the digits | 21 |
| No of digits | 4 |