Compare 1286 vs 1287
| Property | 1286 | 1287 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 4 |
| Prime factorization | 21 × 6431 | 32 × 111 × 131 |
| Prime factorization | 2 × 643 | 3 × 3 × 11 × 13 |
| Divisors count | 4 | 12 |
| Divisors | 1, 2, 643, 1286 | 1, 3, 9, 11, 13, 33, 39, 99, 117, 143, 429, 1287 |
| Number of properties | 1 | 0 |
| Semiprimes | 379th | |
| Roman numberals | MCCLXXXVI | MCCLXXXVII |
| Base 2 | 101000001102 | 101000001112 |
| Base 3 | 12021223 | 12022003 |
| Base 4 | 1100124 | 1100134 |
| Base 5 | 201215 | 201225 |
| Base 6 | 55426 | 55436 |
| Base 7 | 35157 | 35167 |
| Base 8 | 24068 | 24078 |
| Base 9 | 16789 | 16809 |
| Base 10 | 128610 | 128710 |
| Base 11 | a6a11 | a7011 |
| Base 12 | 8b212 | 8b312 |
| Base 13 | 77c13 | 78013 |
| Base 14 | 67c14 | 67d14 |
| Base 15 | 5ab15 | 5ac15 |
| Base 16 | 50616 | 50716 |