Compare 4 vs 61
| Property | 4 | 61 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 1 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 22 | 611 |
| Prime factorization | 2 × 2 | 61 |
| Divisors count | 3 | 2 |
| Divisors | 1, 2, 4 | 1, 61 |
| Number of properties | 1 | 12 |
| Additive primes | 11th | |
| Centered decagonal primes | 3rd | |
| Centered square primes | 4th | |
| Cuban primes 1 | 4th | |
| Long primes | 8th | |
| Primes | 18th | |
| Pythagorean primes | 8th | |
| Semiprimes | 1st | |
| 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 | IV | LXI |
| Base 2 | 1002 | 1111012 |
| Base 3 | 113 | 20213 |
| Base 4 | 104 | 3314 |
| Base 5 | 45 | 2215 |
| Base 6 | 46 | 1416 |
| Base 7 | 47 | 1157 |
| Base 8 | 48 | 758 |
| Base 9 | 49 | 679 |
| Base 10 | 410 | 6110 |
| Base 11 | 411 | 5611 |
| Base 12 | 412 | 5112 |
| Base 13 | 413 | 4913 |
| Base 14 | 414 | 4514 |
| Base 15 | 415 | 4115 |
| Base 16 | 416 | 3d16 |