Compare 1281 vs 1286
| Property | 1281 | 1286 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 31 × 71 × 611 | 21 × 6431 |
| Prime factorization | 3 × 7 × 61 | 2 × 643 |
| Divisors count | 8 | 4 |
| Divisors | 1, 3, 7, 21, 61, 183, 427, 1281 | 1, 2, 643, 1286 |
| Number of properties | 0 | 1 |
| Semiprimes | 379th | |
| Roman numberals | MCCLXXXI | MCCLXXXVI |
| Base 2 | 101000000012 | 101000001102 |
| Base 3 | 12021103 | 12021223 |
| Base 4 | 1100014 | 1100124 |
| Base 5 | 201115 | 201215 |
| Base 6 | 55336 | 55426 |
| Base 7 | 35107 | 35157 |
| Base 8 | 24018 | 24068 |
| Base 9 | 16739 | 16789 |
| Base 10 | 128110 | 128610 |
| Base 11 | a6511 | a6a11 |
| Base 12 | 8a912 | 8b212 |
| Base 13 | 77713 | 77c13 |
| Base 14 | 67714 | 67c14 |
| Base 15 | 5a615 | 5ab15 |
| Base 16 | 50116 | 50616 |