Compare 21139 vs 21787
| Property | 21139 | 21787 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 211391 | 217871 |
| Prime factorization | 21139 | 21787 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21139 | 1, 21787 |
| Number of properties | 5 | 4 |
| Cousin primes (1st member) | 360th | |
| Good primes | 266th | |
| Happy primes | 405th | |
| Isolated primes | 1656th | 1703rd |
| Lucky primes | 385th | 396th |
| Primes | 2375th | 2444th |
| Roman numberals | ||
| Base 2 | 1010010100100112 | 1010101000110112 |
| Base 3 | 10012222213 | 10022122213 |
| Base 4 | 110221034 | 111101234 |
| Base 5 | 11340245 | 11441225 |
| Base 6 | 2415116 | 2445116 |
| Base 7 | 1154267 | 1203437 |
| Base 8 | 512238 | 524338 |
| Base 9 | 318879 | 327879 |
| Base 10 | 2113910 | 2178710 |
| Base 11 | 1497811 | 1540711 |
| Base 12 | 1029712 | 1073712 |
| Base 13 | 981113 | 9bbc13 |
| Base 14 | 79bd14 | 7d2314 |
| Base 15 | 63e415 | 66c715 |
| Base 16 | 529316 | 551b16 |