Compare 1261 vs 1285
| Property | 1261 | 1285 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 131 × 971 | 51 × 2571 |
| Prime factorization | 13 × 97 | 5 × 257 |
| Divisors count | 4 | 4 |
| Divisors | 1, 13, 97, 1261 | 1, 5, 257, 1285 |
| Number of properties | 1 | 1 |
| Semiprimes | 371st | 378th |
| Roman numberals | MCCLXI | MCCLXXXV |
| Base 2 | 100111011012 | 101000001012 |
| Base 3 | 12012013 | 12021213 |
| Base 4 | 1032314 | 1100114 |
| Base 5 | 200215 | 201205 |
| Base 6 | 55016 | 55416 |
| Base 7 | 34517 | 35147 |
| Base 8 | 23558 | 24058 |
| Base 9 | 16519 | 16779 |
| Base 10 | 126110 | 128510 |
| Base 11 | a4711 | a6911 |
| Base 12 | 89112 | 8b112 |
| Base 13 | 76013 | 77b13 |
| Base 14 | 66114 | 67b14 |
| Base 15 | 59115 | 5aa15 |
| Base 16 | 4ed16 | 50516 |