Compare 1987 vs 2521
| Property | 1987 | 2521 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 19871 | 25211 |
| Prime factorization | 1987 | 2521 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1987 | 1, 2521 |
| Number of properties | 6 | 6 |
| Centered square primes | 18th | |
| Good primes | 62nd | 71st |
| Harmonic primes | 138th | |
| Isolated primes | 181st | 226th |
| Lucky primes | 70th | |
| Primes | 300th | 369th |
| Pythagorean primes | 181st | |
| Sexy primes (1st member) | 127th | |
| Sexy prime triplets (1st member) | 50th | |
| Roman numberals | MCMLXXXVII | MMDXXI |
| Base 2 | 111110000112 | 1001110110012 |
| Base 3 | 22011213 | 101101013 |
| Base 4 | 1330034 | 2131214 |
| Base 5 | 304225 | 400415 |
| Base 6 | 131116 | 154016 |
| Base 7 | 55367 | 102317 |
| Base 8 | 37038 | 47318 |
| Base 9 | 26479 | 34119 |
| Base 10 | 198710 | 252110 |
| Base 11 | 154711 | 199211 |
| Base 12 | 119712 | 156112 |
| Base 13 | b9b13 | 11bc13 |
| Base 14 | a1d14 | cc114 |
| Base 15 | 8c715 | b3115 |
| Base 16 | 7c316 | 9d916 |