Compare 661439 vs 661442
| Property | 661439 | 661442 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6614391 | 21 × 3307211 |
| Prime factorization | 661439 | 2 × 330721 |
| Divisors count | 2 | 4 |
| Divisors | 1, 661439 | 1, 2, 330721, 661442 |
| Number of properties | 5 | 1 |
| Additive primes | 20957th | |
| Isolated primes | 42097th | |
| Primes | 53680th | |
| Safe primes | 3100th | |
| Semiprimes | 141532nd | |
| Ulam primes | 3940th | |
| Roman numberals | ||
| Base 2 | 101000010111101111112 | 101000010111110000102 |
| Base 3 | 10201210222023 | 10201210222123 |
| Base 4 | 22011323334 | 22011330024 |
| Base 5 | 1321312245 | 1321312325 |
| Base 6 | 221021156 | 221021226 |
| Base 7 | 54232527 | 54232557 |
| Base 8 | 24136778 | 24137028 |
| Base 9 | 12172829 | 12172859 |
| Base 10 | 66143910 | 66144210 |
| Base 11 | 411a4911 | 411a5111 |
| Base 12 | 27a93b12 | 27a94212 |
| Base 13 | 1a20ac13 | 1a20b213 |
| Base 14 | 13309914 | 13309c14 |
| Base 15 | d0eae15 | d0eb215 |
| Base 16 | a17bf16 | a17c216 |