Compare 1565 vs 1571
| Property | 1565 | 1571 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 3131 | 15711 |
| Prime factorization | 5 × 313 | 1571 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 313, 1565 | 1, 1571 |
| Number of properties | 1 | 4 |
| Cousin primes (2nd member) | 55th | |
| Isolated primes | 149th | |
| Long primes | 96th | |
| Primes | 248th | |
| Semiprimes | 455th | |
| Roman numberals | MDLXV | MDLXXI |
| Base 2 | 110000111012 | 110001000112 |
| Base 3 | 20102223 | 20110123 |
| Base 4 | 1201314 | 1202034 |
| Base 5 | 222305 | 222415 |
| Base 6 | 111256 | 111356 |
| Base 7 | 43647 | 44037 |
| Base 8 | 30358 | 30438 |
| Base 9 | 21289 | 21359 |
| Base 10 | 156510 | 157110 |
| Base 11 | 11a311 | 11a911 |
| Base 12 | aa512 | aab12 |
| Base 13 | 93513 | 93b13 |
| Base 14 | 7db14 | 80314 |
| Base 15 | 6e515 | 6eb15 |
| Base 16 | 61d16 | 62316 |