Compare 6421 vs 6581
| Property | 6421 | 6581 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 64211 | 65811 |
| Prime factorization | 6421 | 6581 |
| Divisors count | 2 | 2 |
| Divisors | 1, 6421 | 1, 6581 |
| Number of properties | 7 | 6 |
| Additive primes | 419th | |
| Chen primes | 456th | 464th |
| Cousin primes (2nd member) | 148th | |
| Harmonic primes | 301st | |
| Isolated primes | 538th | 549th |
| Primes | 835th | 852nd |
| Pythagorean primes | 410th | 420th |
| Sexy primes (1st member) | 302nd | |
| Sophie germain primes | 147th | |
| Roman numberals | ||
| Base 2 | 11001000101012 | 11001101101012 |
| Base 3 | 222102113 | 1000002023 |
| Base 4 | 12101114 | 12123114 |
| Base 5 | 2011415 | 2023115 |
| Base 6 | 454216 | 502456 |
| Base 7 | 245027 | 251217 |
| Base 8 | 144258 | 146658 |
| Base 9 | 87249 | 100229 |
| Base 10 | 642110 | 658110 |
| Base 11 | 490811 | 4a4311 |
| Base 12 | 387112 | 398512 |
| Base 13 | 2bcc13 | 2cc313 |
| Base 14 | 24a914 | 258114 |
| Base 15 | 1d8115 | 1e3b15 |
| Base 16 | 191516 | 19b516 |