Compare 1287 vs 1289
| Property | 1287 | 1289 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 32 × 111 × 131 | 12891 |
| Prime factorization | 3 × 3 × 11 × 13 | 1289 |
| Divisors count | 12 | 2 |
| Divisors | 1, 3, 9, 11, 13, 33, 39, 99, 117, 143, 429, 1287 | 1, 1289 |
| Number of properties | 0 | 7 |
| Chen primes | 136th | |
| Primes | 209th | |
| Pythagorean primes | 103rd | |
| Sexy primes (2nd member) | 90th | |
| Sexy prime triplets (3rd member) | 34th | |
| Sophie germain primes | 45th | |
| Twin primes (1st member) | 44th | |
| Roman numberals | MCCLXXXVII | MCCLXXXIX |
| Base 2 | 101000001112 | 101000010012 |
| Base 3 | 12022003 | 12022023 |
| Base 4 | 1100134 | 1100214 |
| Base 5 | 201225 | 201245 |
| Base 6 | 55436 | 55456 |
| Base 7 | 35167 | 35217 |
| Base 8 | 24078 | 24118 |
| Base 9 | 16809 | 16829 |
| Base 10 | 128710 | 128910 |
| Base 11 | a7011 | a7211 |
| Base 12 | 8b312 | 8b512 |
| Base 13 | 78013 | 78213 |
| Base 14 | 67d14 | 68114 |
| Base 15 | 5ac15 | 5ae15 |
| Base 16 | 50716 | 50916 |