Compare 640451 vs 640457
| Property | 640451 | 640457 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 71 × 914931 | 6404571 |
| Prime factorization | 7 × 91493 | 640457 |
| Divisors count | 4 | 2 |
| Divisors | 1, 7, 91493, 640451 | 1, 640457 |
| Number of properties | 1 | 4 |
| Chen primes | 20391st | |
| Isolated primes | 40839th | |
| Primes | 52110th | |
| Semiprimes | 137234th | |
| Sexy primes (1st member) | 11290th | |
| Roman numberals | ||
| Base 2 | 100111000101110000112 | 100111000101110010012 |
| Base 3 | 10121121121023 | 10121121121223 |
| Base 4 | 21301130034 | 21301130214 |
| Base 5 | 1304433015 | 1304433125 |
| Base 6 | 214210156 | 214210256 |
| Base 7 | 53051307 | 53051367 |
| Base 8 | 23427038 | 23427118 |
| Base 9 | 11754729 | 11754789 |
| Base 10 | 64045110 | 64045710 |
| Base 11 | 3a81a911 | 3a820411 |
| Base 12 | 26a76b12 | 26a77512 |
| Base 13 | 19568613 | 19568c13 |
| Base 14 | 12958714 | 12958d14 |
| Base 15 | c9b6b15 | c9b7215 |
| Base 16 | 9c5c316 | 9c5c916 |