Compare 1205 vs 1213
| Property | 1205 | 1213 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 2411 | 12131 |
| Prime factorization | 5 × 241 | 1213 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 241, 1205 | 1, 1213 |
| Number of properties | 1 | 7 |
| Additive primes | 106th | |
| Cousin primes (1st member) | 45th | |
| Emirps | 52nd | |
| Good primes | 49th | |
| Isolated primes | 117th | |
| Primes | 198th | |
| Pythagorean primes | 97th | |
| Semiprimes | 356th | |
| Roman numberals | MCCV | MCCXIII |
| Base 2 | 100101101012 | 100101111012 |
| Base 3 | 11221223 | 11222213 |
| Base 4 | 1023114 | 1023314 |
| Base 5 | 143105 | 143235 |
| Base 6 | 53256 | 53416 |
| Base 7 | 33417 | 33527 |
| Base 8 | 22658 | 22758 |
| Base 9 | 15789 | 15879 |
| Base 10 | 120510 | 121310 |
| Base 11 | 9a611 | a0311 |
| Base 12 | 84512 | 85112 |
| Base 13 | 71913 | 72413 |
| Base 14 | 62114 | 62914 |
| Base 15 | 55515 | 55d15 |
| Base 16 | 4b516 | 4bd16 |