Compare 661139 vs 661145
| Property | 661139 | 661145 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6611391 | 51 × 1322291 |
| Prime factorization | 661139 | 5 × 132229 |
| Divisors count | 2 | 4 |
| Divisors | 1, 661139 | 1, 5, 132229, 661145 |
| Number of properties | 4 | 1 |
| Chen primes | 20993rd | |
| Isolated primes | 42080th | |
| Primes | 53661st | |
| Safe primes | 3099th | |
| Semiprimes | 141466th | |
| Roman numberals | ||
| Base 2 | 101000010110100100112 | 101000010110100110012 |
| Base 3 | 10201202201223 | 10201202202123 |
| Base 4 | 22011221034 | 22011221214 |
| Base 5 | 1321240245 | 1321240405 |
| Base 6 | 221004556 | 221005056 |
| Base 7 | 54223437 | 54223527 |
| Base 8 | 24132238 | 24132318 |
| Base 9 | 12168189 | 12168259 |
| Base 10 | 66113910 | 66114510 |
| Base 11 | 4117a611 | 41180111 |
| Base 12 | 27a72b12 | 27a73512 |
| Base 13 | 1a1c0b13 | 1a1c1413 |
| Base 14 | 132d2314 | 132d2914 |
| Base 15 | d0d5e15 | d0d6515 |
| Base 16 | a169316 | a169916 |