Compare 445 vs 457
| Property | 445 | 457 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 891 | 4571 |
| Prime factorization | 5 × 89 | 457 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 89, 445 | 1, 457 |
| Number of properties | 1 | 6 |
| Cousin primes (1st member) | 24th | |
| Isolated primes | 43rd | |
| Primes | 88th | |
| Prime triplets (1st member) | 21st | |
| Pythagorean primes | 43rd | |
| Semiprimes | 136th | |
| Sexy primes (1st member) | 45th | |
| Roman numberals | CDXLV | CDLVII |
| Base 2 | 1101111012 | 1110010012 |
| Base 3 | 1211113 | 1212213 |
| Base 4 | 123314 | 130214 |
| Base 5 | 32405 | 33125 |
| Base 6 | 20216 | 20416 |
| Base 7 | 12047 | 12227 |
| Base 8 | 6758 | 7118 |
| Base 9 | 5449 | 5579 |
| Base 10 | 44510 | 45710 |
| Base 11 | 37511 | 38611 |
| Base 12 | 31112 | 32112 |
| Base 13 | 28313 | 29213 |
| Base 14 | 23b14 | 24914 |
| Base 15 | 1ea15 | 20715 |
| Base 16 | 1bd16 | 1c916 |