Compare 640421 vs 640457
| Property | 640421 | 640457 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6404211 | 6404571 |
| Prime factorization | 640421 | 640457 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640421 | 1, 640457 |
| Number of properties | 3 | 4 |
| Additive primes | 20365th | |
| Chen primes | 20391st | |
| Isolated primes | 40838th | 40839th |
| Primes | 52109th | 52110th |
| Sexy primes (1st member) | 11290th | |
| Roman numberals | ||
| Base 2 | 100111000101101001012 | 100111000101110010012 |
| Base 3 | 10121121110223 | 10121121121223 |
| Base 4 | 21301122114 | 21301130214 |
| Base 5 | 1304431415 | 1304433125 |
| Base 6 | 214205256 | 214210256 |
| Base 7 | 53050557 | 53051367 |
| Base 8 | 23426458 | 23427118 |
| Base 9 | 11754389 | 11754789 |
| Base 10 | 64042110 | 64045710 |
| Base 11 | 3a818111 | 3a820411 |
| Base 12 | 26a74512 | 26a77512 |
| Base 13 | 19566213 | 19568c13 |
| Base 14 | 12956514 | 12958d14 |
| Base 15 | c9b4b15 | c9b7215 |
| Base 16 | 9c5a516 | 9c5c916 |