Compare 642121 vs 642149
| Property | 642121 | 642149 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6421211 | 6421491 |
| Prime factorization | 642121 | 642149 |
| Divisors count | 2 | 2 |
| Divisors | 1, 642121 | 1, 642149 |
| Number of properties | 2 | 3 |
| Chen primes | 20432nd | |
| Isolated primes | 40935th | |
| Primes | 52230th | 52232nd |
| Twin primes (1st member) | 5649th | |
| Roman numberals | ||
| Base 2 | 100111001100010010012 | 100111001100011001012 |
| Base 3 | 10121212110213 | 10121212120223 |
| Base 4 | 21303010214 | 21303012114 |
| Base 5 | 1310214415 | 1310220445 |
| Base 6 | 214324416 | 214325256 |
| Base 7 | 53130347 | 53131047 |
| Base 8 | 23461118 | 23461458 |
| Base 9 | 11777379 | 11777689 |
| Base 10 | 64212110 | 64214910 |
| Base 11 | 3a948711 | 3a950211 |
| Base 12 | 26b72112 | 26b74512 |
| Base 13 | 19636c13 | 19639113 |
| Base 14 | 12a01b14 | 12a03b14 |
| Base 15 | ca3d115 | ca3ee15 |
| Base 16 | 9cc4916 | 9cc6516 |