Compare 139 vs 145
| Property | 139 | 145 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 1391 | 51 × 291 |
| Prime factorization | 139 | 5 × 29 |
| Divisors count | 2 | 4 |
| Divisors | 1, 139 | 1, 5, 29, 145 |
| Number of properties | 6 | 1 |
| Additive primes | 19th | |
| Chen primes | 28th | |
| Happy primes | 10th | |
| Harmonic primes | 11th | |
| Primes | 34th | |
| Semiprimes | 49th | |
| Twin primes (2nd member) | 11th | |
| Roman numberals | CXXXIX | CXLV |
| Base 2 | 100010112 | 100100012 |
| Base 3 | 120113 | 121013 |
| Base 4 | 20234 | 21014 |
| Base 5 | 10245 | 10405 |
| Base 6 | 3516 | 4016 |
| Base 7 | 2567 | 2657 |
| Base 8 | 2138 | 2218 |
| Base 9 | 1649 | 1719 |
| Base 10 | 13910 | 14510 |
| Base 11 | 11711 | 12211 |
| Base 12 | b712 | 10112 |
| Base 13 | a913 | b213 |
| Base 14 | 9d14 | a514 |
| Base 15 | 9415 | 9a15 |
| Base 16 | 8b16 | 9116 |