Compare 161221 vs 161561
| Property | 161221 | 161561 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 1612211 | 1615611 |
| Prime factorization | 161221 | 161561 |
| Divisors count | 2 | 2 |
| Divisors | 1, 161221 | 1, 161561 |
| Number of properties | 5 | 8 |
| Additive primes | 6065th | |
| Chen primes | 6316th | |
| Emirps | 3259th | |
| Happy primes | 2292nd | |
| Isolated primes | 11163rd | |
| Lucky primes | 1908th | |
| Primes | 14786th | 14813th |
| Pythagorean primes | 7376th | 7387th |
| Sophie germain primes | 1731st | |
| Super primes | 1735th | |
| Twin primes (1st member) | 1815th | |
| Roman numberals | ||
| Base 2 | 1001110101110001012 | 1001110111000110012 |
| Base 3 | 220120110113 | 220121212023 |
| Base 4 | 2131130114 | 2131301214 |
| Base 5 | 201243415 | 201322215 |
| Base 6 | 32422216 | 32435456 |
| Base 7 | 12410147 | 12420117 |
| Base 8 | 4727058 | 4734318 |
| Base 9 | 2651349 | 2655529 |
| Base 10 | 16122110 | 16156110 |
| Base 11 | 10014511 | 10042411 |
| Base 12 | 7937112 | 795b512 |
| Base 13 | 584c813 | 586ca13 |
| Base 14 | 42a7b14 | 42c4114 |
| Base 15 | 32b8115 | 32d0b15 |
| Base 16 | 275c516 | 2771916 |