Names of 81001
| Nominal | 81001 |
| Cardinal | eighty-one thousand one |
| Ordinal | 81,001st |
| This number as US currency | eighty-one thousand one dollars |
| Is 81001 an odd number? | 81001 is an odd number |
| Is 81001 an even number? | 81001 is NOT an even number |
| Is 81001 a palindrome? | 81001 is NOT a palindrome number |
| Is 81001 a triangle number? | 81001 is NOT a triangle number |
81001 in other Bases
| Base 2 (Binary) | 100111100011010012 |
| Base 3 (Ternary) | 110100100013 |
| Base 4 (Quaternary) | 1033012214 |
| Base 5 (Quinary) | 100430015 |
| Base 6 (Senary) | 14230016 |
| Base 8 (Octal) | 2361518 |
| Base 12 (Duodecimal) | 3AA6112 |
| Base 16 (Hexadecimal) | 13C6916 |
| Base 20 (Vigesimal) | A2A120 |
Primes and Factors tests for 81001
| Is 81001 a Prime Number? | 81001 is a prime |
| Is 81001 a perfect number? | 81001 is NOT a perfect number |
| Is 81001 a Mersenne Prime? | 81001 is NOT a Mersenne prime |
| Is 81001 a Fermat Prime? | 81001 is NOT a Fermat prime |
| Is 81001 a Fibonacci Prime? | 81001 is NOT a Fibonacci prime |
| Is 81001 a Partition Prime? | 81001 is NOT a Partition prime |
| Is 81001 a Pell Prime? | 81001 is NOT a Pell prime |
| Prime Factors | Prime factors of 81001 |
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81001 in other Numerals
| 81001 in Roman Numeral | LXXXMI |
| 81001 in Chinese Numeral | 捌萬壹仟壹 |
| 81001 in Egyptian Numeral | 𓂴𓆼𓏺 |
| 81001 in Babylonian Numeral |    |
Roots and stuff for 81001
| Is 81001 a square number? | 81001 is NOT a square number |
| Is 81001 a cube number? | 81001 is NOT a cube number |
| Square root of the number 81001 | 284.60674623065 |
| Cube root of the number 81001 | 43.267665163992 |
Recreational math for 81001
| Number 81001 reversed | 10018 |
| Sum of the digits | 10 |
| No of digits | 5 |