Compare 121 vs 145
| Property | 121 | 145 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 112 | 51 × 291 |
| Prime factorization | 11 × 11 | 5 × 29 |
| Divisors count | 3 | 4 |
| Divisors | 1, 11, 121 | 1, 5, 29, 145 |
| Number of properties | 1 | 1 |
| Semiprimes | 40th | 49th |
| Roman numberals | CXXI | CXLV |
| Base 2 | 11110012 | 100100012 |
| Base 3 | 111113 | 121013 |
| Base 4 | 13214 | 21014 |
| Base 5 | 4415 | 10405 |
| Base 6 | 3216 | 4016 |
| Base 7 | 2327 | 2657 |
| Base 8 | 1718 | 2218 |
| Base 9 | 1449 | 1719 |
| Base 10 | 12110 | 14510 |
| Base 11 | 10011 | 12211 |
| Base 12 | a112 | 10112 |
| Base 13 | 9413 | b213 |
| Base 14 | 8914 | a514 |
| Base 15 | 8115 | 9a15 |
| Base 16 | 7916 | 9116 |