Compare 642145 vs 642157
| Property | 642145 | 642157 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 51 × 72 × 26211 | 6421571 |
| Prime factorization | 5 × 7 × 7 × 2621 | 642157 |
| Divisors count | 12 | 2 |
| Divisors | 1, 5, 7, 35, 49, 245, 2621, 13105, 18347, 91735, 128429, 642145 | 1, 642157 |
| Number of properties | 0 | 5 |
| Isolated primes | 40937th | |
| Primes | 52234th | |
| Sexy primes (1st member) | 11317th | |
| Sexy primes (2nd member) | 11316th | |
| Sexy prime triplets (2nd member) | 2075th | |
| Roman numberals | ||
| Base 2 | 100111001100011000012 | 100111001100011011012 |
| Base 3 | 10121212120113 | 10121212121213 |
| Base 4 | 21303012014 | 21303012314 |
| Base 5 | 1310220405 | 1310221125 |
| Base 6 | 214325216 | 214325416 |
| Base 7 | 53131007 | 53131157 |
| Base 8 | 23461418 | 23461558 |
| Base 9 | 11777649 | 11777779 |
| Base 10 | 64214510 | 64215710 |
| Base 11 | 3a94a911 | 3a950a11 |
| Base 12 | 26b74112 | 26b75112 |
| Base 13 | 19638a13 | 19639913 |
| Base 14 | 12a03714 | 12a04514 |
| Base 15 | ca3ea15 | ca40715 |
| Base 16 | 9cc6116 | 9cc6d16 |