Compare 1642 vs 1643
| Property | 1642 | 1643 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 21 × 8211 | 311 × 531 |
| Prime factorization | 2 × 821 | 31 × 53 |
| Divisors count | 4 | 4 |
| Divisors | 1, 2, 821, 1642 | 1, 31, 53, 1643 |
| Number of properties | 1 | 1 |
| Semiprimes | 471st | 472nd |
| Roman numberals | MDCXLII | MDCXLIII |
| Base 2 | 110011010102 | 110011010112 |
| Base 3 | 20202113 | 20202123 |
| Base 4 | 1212224 | 1212234 |
| Base 5 | 230325 | 230335 |
| Base 6 | 113346 | 113356 |
| Base 7 | 45347 | 45357 |
| Base 8 | 31528 | 31538 |
| Base 9 | 22249 | 22259 |
| Base 10 | 164210 | 164310 |
| Base 11 | 126311 | 126411 |
| Base 12 | b4a12 | b4b12 |
| Base 13 | 99413 | 99513 |
| Base 14 | 85414 | 85514 |
| Base 15 | 74715 | 74815 |
| Base 16 | 66a16 | 66b16 |