Compare 42 vs 61
| Property | 42 | 61 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 31 × 71 | 611 |
| Prime factorization | 2 × 3 × 7 | 61 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 3, 6, 7, 14, 21, 42 | 1, 61 |
| Number of properties | 0 | 12 |
| Additive primes | 11th | |
| Centered decagonal primes | 3rd | |
| Centered square primes | 4th | |
| Cuban primes 1 | 4th | |
| Long primes | 8th | |
| Primes | 18th | |
| Pythagorean primes | 8th | |
| Sexy primes (1st member) | 12th | |
| Sexy prime quadrupletss (1st member) | 4th | |
| Sexy prime triplets (1st member) | 8th | |
| Solinas primes | 15th | |
| Twin primes (2nd member) | 7th | |
| Roman numberals | XLII | LXI |
| Base 2 | 1010102 | 1111012 |
| Base 3 | 11203 | 20213 |
| Base 4 | 2224 | 3314 |
| Base 5 | 1325 | 2215 |
| Base 6 | 1106 | 1416 |
| Base 7 | 607 | 1157 |
| Base 8 | 528 | 758 |
| Base 9 | 469 | 679 |
| Base 10 | 4210 | 6110 |
| Base 11 | 3911 | 5611 |
| Base 12 | 3612 | 5112 |
| Base 13 | 3313 | 4913 |
| Base 14 | 3014 | 4514 |
| Base 15 | 2c15 | 4115 |
| Base 16 | 2a16 | 3d16 |