Compare 1557 vs 1559
| Property | 1557 | 1559 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 2 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 32 × 1731 | 15591 |
| Prime factorization | 3 × 3 × 173 | 1559 |
| Divisors count | 6 | 2 |
| Divisors | 1, 3, 9, 173, 519, 1557 | 1, 1559 |
| Number of properties | 0 | 6 |
| Chen primes | 157th | |
| Emirps | 75th | |
| Isolated primes | 147th | |
| Primes | 246th | |
| Sexy primes (2nd member) | 107th | |
| Sophie germain primes | 52nd | |
| Roman numberals | MDLVII | MDLIX |
| Base 2 | 110000101012 | 110000101112 |
| Base 3 | 20102003 | 20102023 |
| Base 4 | 1201114 | 1201134 |
| Base 5 | 222125 | 222145 |
| Base 6 | 111136 | 111156 |
| Base 7 | 43537 | 43557 |
| Base 8 | 30258 | 30278 |
| Base 9 | 21209 | 21229 |
| Base 10 | 155710 | 155910 |
| Base 11 | 119611 | 119811 |
| Base 12 | a9912 | a9b12 |
| Base 13 | 92a13 | 92c13 |
| Base 14 | 7d314 | 7d514 |
| Base 15 | 6dc15 | 6de15 |
| Base 16 | 61516 | 61716 |