Compare 642487 vs 642491
| Property | 642487 | 642491 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6424871 | 891 × 72191 |
| Prime factorization | 642487 | 89 × 7219 |
| Divisors count | 2 | 4 |
| Divisors | 1, 642487 | 1, 89, 7219, 642491 |
| Number of properties | 4 | 1 |
| Additive primes | 20423rd | |
| Chen primes | 20439th | |
| Isolated primes | 40953rd | |
| Primes | 52254th | |
| Semiprimes | 137662nd | |
| Roman numberals | ||
| Base 2 | 100111001101101101112 | 100111001101101110112 |
| Base 3 | 10121220222113 | 10121220222223 |
| Base 4 | 21303123134 | 21303123234 |
| Base 5 | 1310244225 | 1310244315 |
| Base 6 | 214342516 | 214342556 |
| Base 7 | 53140667 | 53141037 |
| Base 8 | 23466678 | 23466738 |
| Base 9 | 11782849 | 11782889 |
| Base 10 | 64248710 | 64249110 |
| Base 11 | 3a978a11 | 3a979311 |
| Base 12 | 26b98712 | 26b98b12 |
| Base 13 | 19659113 | 19659513 |
| Base 14 | 12a1dd14 | 12a20314 |
| Base 15 | ca57715 | ca57b15 |
| Base 16 | 9cdb716 | 9cdbb16 |