Compare 21391 vs 21407
| Property | 21391 | 21407 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 213911 | 214071 |
| Prime factorization | 21391 | 21407 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21391 | 1, 21407 |
| Number of properties | 3 | 6 |
| Chen primes | 1180th | |
| Happy primes | 398th | |
| Isolated primes | 1676th | 1679th |
| Long primes | 911th | |
| Primes | 2401st | 2404th |
| Sexy primes (1st member) | 729th | |
| Sexy primes (2nd member) | 730th | |
| Roman numberals | ||
| Base 2 | 1010011100011112 | 1010011100111112 |
| Base 3 | 10021000213 | 10021002123 |
| Base 4 | 110320334 | 110321334 |
| Base 5 | 11410315 | 11411125 |
| Base 6 | 2430116 | 2430356 |
| Base 7 | 1162367 | 1162617 |
| Base 8 | 516178 | 516378 |
| Base 9 | 323079 | 323259 |
| Base 10 | 2139110 | 2140710 |
| Base 11 | 1508711 | 150a111 |
| Base 12 | 1046712 | 1047b12 |
| Base 13 | 997613 | 998913 |
| Base 14 | 7b1d14 | 7b3114 |
| Base 15 | 651115 | 652215 |
| Base 16 | 538f16 | 539f16 |