Compare 640261 vs 640263
| Property | 640261 | 640263 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 6402611 | 31 × 131 × 164171 |
| Prime factorization | 640261 | 3 × 13 × 16417 |
| Divisors count | 2 | 8 |
| Divisors | 1, 640261 | 1, 3, 13, 39, 16417, 49251, 213421, 640263 |
| Number of properties | 5 | 0 |
| Additive primes | 20363rd | |
| Lucky primes | 5980th | |
| Primes | 52100th | |
| Sexy primes (1st member) | 11288th | |
| Twin primes (2nd member) | 5636th | |
| Roman numberals | ||
| Base 2 | 100111000101000001012 | 100111000101000001112 |
| Base 3 | 10121120211013 | 10121120211103 |
| Base 4 | 21301100114 | 21301100134 |
| Base 5 | 1304420215 | 1304420235 |
| Base 6 | 214201016 | 214201036 |
| Base 7 | 53044367 | 53044417 |
| Base 8 | 23424058 | 23424078 |
| Base 9 | 11752419 | 11752439 |
| Base 10 | 64026110 | 64026310 |
| Base 11 | 3a804611 | 3a804811 |
| Base 12 | 26a63112 | 26a63312 |
| Base 13 | 19556b13 | 19557013 |
| Base 14 | 12948d14 | 12949114 |
| Base 15 | c9a9115 | c9a9315 |
| Base 16 | 9c50516 | 9c50716 |