Compare 128 vs 129
| Property | 128 | 129 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 7 | 2 |
| Prime factorization | 27 | 31 × 431 |
| Prime factorization | 2 × 2 × 2 × 2 × 2 × 2 × 2 | 3 × 43 |
| Divisors count | 8 | 4 |
| Divisors | 1, 2, 4, 8, 16, 32, 64, 128 | 1, 3, 43, 129 |
| Number of properties | 0 | 1 |
| Semiprimes | 43rd | |
| Roman numberals | CXXVIII | CXXIX |
| Base 2 | 100000002 | 100000012 |
| Base 3 | 112023 | 112103 |
| Base 4 | 20004 | 20014 |
| Base 5 | 10035 | 10045 |
| Base 6 | 3326 | 3336 |
| Base 7 | 2427 | 2437 |
| Base 8 | 2008 | 2018 |
| Base 9 | 1529 | 1539 |
| Base 10 | 12810 | 12910 |
| Base 11 | 10711 | 10811 |
| Base 12 | a812 | a912 |
| Base 13 | 9b13 | 9c13 |
| Base 14 | 9214 | 9314 |
| Base 15 | 8815 | 8915 |
| Base 16 | 8016 | 8116 |