Compare 6421 vs 6491
| Property | 6421 | 6491 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 64211 | 64911 |
| Prime factorization | 6421 | 6491 |
| Divisors count | 2 | 2 |
| Divisors | 1, 6421 | 1, 6491 |
| Number of properties | 7 | 4 |
| Additive primes | 419th | |
| Chen primes | 456th | 460th |
| Harmonic primes | 301st | |
| Isolated primes | 538th | 543rd |
| Primes | 835th | 842nd |
| Pythagorean primes | 410th | |
| Sexy primes (1st member) | 302nd | |
| Sophie germain primes | 143rd | |
| Roman numberals | ||
| Base 2 | 11001000101012 | 11001010110112 |
| Base 3 | 222102113 | 222201023 |
| Base 4 | 12101114 | 12111234 |
| Base 5 | 2011415 | 2014315 |
| Base 6 | 454216 | 500156 |
| Base 7 | 245027 | 246327 |
| Base 8 | 144258 | 145338 |
| Base 9 | 87249 | 88129 |
| Base 10 | 642110 | 649110 |
| Base 11 | 490811 | 497111 |
| Base 12 | 387112 | 390b12 |
| Base 13 | 2bcc13 | 2c5413 |
| Base 14 | 24a914 | 251914 |
| Base 15 | 1d8115 | 1dcb15 |
| Base 16 | 191516 | 195b16 |