Compare 1213 vs 1215
| Property | 1213 | 1215 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 2 |
| Total factors | 1 | 6 |
| Prime factorization | 12131 | 35 × 51 |
| Prime factorization | 1213 | 3 × 3 × 3 × 3 × 3 × 5 |
| Divisors count | 2 | 12 |
| Divisors | 1, 1213 | 1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215 |
| Number of properties | 7 | 0 |
| Additive primes | 106th | |
| Cousin primes (1st member) | 45th | |
| Emirps | 52nd | |
| Good primes | 49th | |
| Isolated primes | 117th | |
| Primes | 198th | |
| Pythagorean primes | 97th | |
| Roman numberals | MCCXIII | MCCXV |
| Base 2 | 100101111012 | 100101111112 |
| Base 3 | 11222213 | 12000003 |
| Base 4 | 1023314 | 1023334 |
| Base 5 | 143235 | 143305 |
| Base 6 | 53416 | 53436 |
| Base 7 | 33527 | 33547 |
| Base 8 | 22758 | 22778 |
| Base 9 | 15879 | 16009 |
| Base 10 | 121310 | 121510 |
| Base 11 | a0311 | a0511 |
| Base 12 | 85112 | 85312 |
| Base 13 | 72413 | 72613 |
| Base 14 | 62914 | 62b14 |
| Base 15 | 55d15 | 56015 |
| Base 16 | 4bd16 | 4bf16 |