Compare 1289 vs 1721
| Property | 1289 | 1721 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 12891 | 17211 |
| Prime factorization | 1289 | 1721 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1289 | 1, 1721 |
| Number of properties | 7 | 6 |
| Additive primes | 143rd | |
| Chen primes | 136th | 169th |
| Primes | 209th | 268th |
| Pythagorean primes | 103rd | 130th |
| Sexy primes (2nd member) | 90th | |
| Sexy prime triplets (3rd member) | 34th | |
| Sophie germain primes | 45th | |
| Twin primes (1st member) | 44th | 55th |
| Ulam primes | 25th | |
| Roman numberals | MCCLXXXIX | MDCCXXI |
| Base 2 | 101000010012 | 110101110012 |
| Base 3 | 12022023 | 21002023 |
| Base 4 | 1100214 | 1223214 |
| Base 5 | 201245 | 233415 |
| Base 6 | 55456 | 115456 |
| Base 7 | 35217 | 50067 |
| Base 8 | 24118 | 32718 |
| Base 9 | 16829 | 23229 |
| Base 10 | 128910 | 172110 |
| Base 11 | a7211 | 132511 |
| Base 12 | 8b512 | bb512 |
| Base 13 | 78213 | a2513 |
| Base 14 | 68114 | 8ad14 |
| Base 15 | 5ae15 | 79b15 |
| Base 16 | 50916 | 6b916 |