Compare 642881 vs 643661
| Property | 642881 | 643661 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6428811 | 6436611 |
| Prime factorization | 642881 | 643661 |
| Divisors count | 2 | 2 |
| Divisors | 1, 642881 | 1, 643661 |
| Number of properties | 6 | 3 |
| Additive primes | 20433rd | |
| Chen primes | 20450th | |
| Cousin primes (2nd member) | 5645th | |
| Isolated primes | 40972nd | 41024th |
| Primes | 52281st | 52337th |
| Sophie germain primes | 5326th | 5336th |
| Roman numberals | ||
| Base 2 | 100111001111010000012 | 100111010010010011012 |
| Base 3 | 10121222121023 | 10122002210223 |
| Base 4 | 21303310014 | 21310210314 |
| Base 5 | 1310330115 | 1310441215 |
| Base 6 | 214401456 | 214435256 |
| Base 7 | 53152017 | 53203647 |
| Base 8 | 23475018 | 23511158 |
| Base 9 | 11787729 | 11808389 |
| Base 10 | 64288110 | 64366110 |
| Base 11 | 3aa00811 | 3aa65711 |
| Base 12 | 27005512 | 2705a512 |
| Base 13 | 19680513 | 196c8513 |
| Base 14 | 12a40114 | 12a7db14 |
| Base 15 | ca73b15 | caaab15 |
| Base 16 | 9cf4116 | 9d24d16 |