Compare 642487 vs 642494
| Property | 642487 | 642494 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6424871 | 21 × 3212471 |
| Prime factorization | 642487 | 2 × 321247 |
| Divisors count | 2 | 4 |
| Divisors | 1, 642487 | 1, 2, 321247, 642494 |
| Number of properties | 4 | 1 |
| Additive primes | 20423rd | |
| Chen primes | 20439th | |
| Isolated primes | 40953rd | |
| Primes | 52254th | |
| Semiprimes | 137664th | |
| Roman numberals | ||
| Base 2 | 100111001101101101112 | 100111001101101111102 |
| Base 3 | 10121220222113 | 10121221000023 |
| Base 4 | 21303123134 | 21303123324 |
| Base 5 | 1310244225 | 1310244345 |
| Base 6 | 214342516 | 214343026 |
| Base 7 | 53140667 | 53141067 |
| Base 8 | 23466678 | 23466768 |
| Base 9 | 11782849 | 11783029 |
| Base 10 | 64248710 | 64249410 |
| Base 11 | 3a978a11 | 3a979611 |
| Base 12 | 26b98712 | 26b99212 |
| Base 13 | 19659113 | 19659813 |
| Base 14 | 12a1dd14 | 12a20614 |
| Base 15 | ca57715 | ca57e15 |
| Base 16 | 9cdb716 | 9cdbe16 |