Compare 1315 vs 1321
| Property | 1315 | 1321 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 2631 | 13211 |
| Prime factorization | 5 × 263 | 1321 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 263, 1315 | 1, 1321 |
| Number of properties | 1 | 7 |
| Additive primes | 118th | |
| Emirps | 63rd | |
| Harmonic primes | 74th | |
| Primes | 216th | |
| Pythagorean primes | 106th | |
| Semiprimes | 385th | |
| Sexy primes (1st member) | 94th | |
| Twin primes (2nd member) | 46th | |
| Roman numberals | MCCCXV | MCCCXXI |
| Base 2 | 101001000112 | 101001010012 |
| Base 3 | 12102013 | 12102213 |
| Base 4 | 1102034 | 1102214 |
| Base 5 | 202305 | 202415 |
| Base 6 | 100316 | 100416 |
| Base 7 | 35567 | 35657 |
| Base 8 | 24438 | 24518 |
| Base 9 | 17219 | 17279 |
| Base 10 | 131510 | 132110 |
| Base 11 | a9611 | aa111 |
| Base 12 | 91712 | 92112 |
| Base 13 | 7a213 | 7a813 |
| Base 14 | 69d14 | 6a514 |
| Base 15 | 5ca15 | 5d115 |
| Base 16 | 52316 | 52916 |