Names of 12991
| Nominal | 12991 |
| Cardinal | twelve thousand nine hundred ninety-one |
| Ordinal | 12,991st |
| This number as US currency | twelve thousand nine hundred ninety-one dollars |
| Is 12991 an odd number? | 12991 is an odd number |
| Is 12991 an even number? | 12991 is NOT an even number |
| Is 12991 a palindrome? | 12991 is NOT a palindrome number |
| Is 12991 a triangle number? | 12991 is NOT a triangle number |
12991 in other Bases
| Base 2 (Binary) | 110010101111112 |
| Base 3 (Ternary) | 1222110113 |
| Base 4 (Quaternary) | 30223334 |
| Base 5 (Quinary) | 4034315 |
| Base 6 (Senary) | 1400516 |
| Base 8 (Octal) | 312778 |
| Base 12 (Duodecimal) | 762712 |
| Base 16 (Hexadecimal) | 32BF16 |
| Base 20 (Vigesimal) | 1C9B20 |
Primes and Factors tests for 12991
| Is 12991 a Prime Number? | 12991 is NOT a prime |
| Is 12991 a perfect number? | 12991 is NOT a perfect number |
| Is 12991 a Mersenne Prime? | 12991 is NOT a Mersenne prime |
| Is 12991 a Fermat Prime? | 12991 is NOT a Fermat prime |
| Is 12991 a Fibonacci Prime? | 12991 is NOT a Fibonacci prime |
| Is 12991 a Partition Prime? | 12991 is NOT a Partition prime |
| Is 12991 a Pell Prime? | 12991 is NOT a Pell prime |
| Prime Factors | Prime factors of 12991 |
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12991 in other Numerals
| 12991 in Roman Numeral | XMMCMXCI |
| 12991 in Chinese Numeral | 壹萬貳仟玖佰玖拾壹 |
| 12991 in Egyptian Numeral | 𓂭𓆽𓍪𓎎𓏺 |
| 12991 in Babylonian Numeral |    |
Roots and stuff for 12991
| Is 12991 a square number? | 12991 is NOT a square number |
| Is 12991 a cube number? | 12991 is NOT a cube number |
| Square root of the number 12991 | 113.97806806575 |
| Cube root of the number 12991 | 23.507919467564 |
Recreational math for 12991
| Number 12991 reversed | 19921 |
| Sum of the digits | 22 |
| No of digits | 5 |