Compare 642145 vs 642151
| Property | 642145 | 642151 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 51 × 72 × 26211 | 6421511 |
| Prime factorization | 5 × 7 × 7 × 2621 | 642151 |
| Divisors count | 12 | 2 |
| Divisors | 1, 5, 7, 35, 49, 245, 2621, 13105, 18347, 91735, 128429, 642145 | 1, 642151 |
| Number of properties | 0 | 6 |
| Additive primes | 20414th | |
| Chen primes | 20433rd | |
| Primes | 52233rd | |
| Sexy primes (1st member) | 11316th | |
| Sexy prime triplets (1st member) | 2075th | |
| Twin primes (2nd member) | 5649th | |
| Roman numberals | ||
| Base 2 | 100111001100011000012 | 100111001100011001112 |
| Base 3 | 10121212120113 | 10121212121013 |
| Base 4 | 21303012014 | 21303012134 |
| Base 5 | 1310220405 | 1310221015 |
| Base 6 | 214325216 | 214325316 |
| Base 7 | 53131007 | 53131067 |
| Base 8 | 23461418 | 23461478 |
| Base 9 | 11777649 | 11777719 |
| Base 10 | 64214510 | 64215110 |
| Base 11 | 3a94a911 | 3a950411 |
| Base 12 | 26b74112 | 26b74712 |
| Base 13 | 19638a13 | 19639313 |
| Base 14 | 12a03714 | 12a03d14 |
| Base 15 | ca3ea15 | ca40115 |
| Base 16 | 9cc6116 | 9cc6716 |