Names of 61
| Nominal | 61 |
| Cardinal | sixty-one |
| Ordinal | 61st |
| This number as US currency | sixty-one dollars |
| Is 61 an odd number? | 61 is an odd number |
| Is 61 an even number? | 61 is NOT an even number |
| Is 61 a palindrome? | 61 is NOT a palindrome number |
| Is 61 a triangle number? | 61 is NOT a triangle number |
61 in other Bases
| Base 2 (Binary) | 1111012 |
| Base 3 (Ternary) | 20213 |
| Base 4 (Quaternary) | 3314 |
| Base 5 (Quinary) | 2215 |
| Base 6 (Senary) | 1416 |
| Base 8 (Octal) | 758 |
| Base 12 (Duodecimal) | 5112 |
| Base 16 (Hexadecimal) | 3D16 |
| Base 20 (Vigesimal) | 3120 |
Primes and Factors tests for 61
| Is 61 a Prime Number? | 61 is a prime |
| Is 61 a perfect number? | 61 is NOT a perfect number |
| Is 61 a Mersenne Prime? | 61 is NOT a Mersenne prime |
| Is 61 a Fermat Prime? | 61 is NOT a Fermat prime |
| Is 61 a Fibonacci Prime? | 61 is NOT a Fibonacci prime |
| Is 61 a Partition Prime? | 61 is NOT a Partition prime |
| Is 61 a Pell Prime? | 61 is NOT a Pell prime |
| Prime Factors | Prime factors of 61 |
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61 in other Numerals
| 61 in Roman Numeral | LXI |
| 61 in Chinese Numeral | 陸拾壹 |
| 61 in Egyptian Numeral | 𓎋𓏺 |
| 61 in Babylonian Numeral |  |
Roots and stuff for 61
| Is 61 a square number? | 61 is NOT a square number |
| Is 61 a cube number? | 61 is NOT a cube number |
| Square root of the number 61 | 7.8102496759067 |
| Cube root of the number 61 | 3.9364971831022 |
Recreational math for 61
| Number 61 reversed | 16 |
| Sum of the digits | 7 |
| No of digits | 2 |