Compare 128287 vs 131687
| Property | 128287 | 131687 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 1282871 | 1316871 |
| Prime factorization | 128287 | 131687 |
| Divisors count | 2 | 2 |
| Divisors | 1, 128287 | 1, 131687 |
| Number of properties | 5 | 5 |
| Cousin primes (1st member) | 1492nd | |
| Good primes | 785th | 794th |
| Isolated primes | 9016th | 9238th |
| Long primes | 4508th | 4606th |
| Primes | 12009th | 12299th |
| Safe primes | 837th | |
| Roman numberals | ||
| Base 2 | 111110101000111112 | 1000000010011001112 |
| Base 3 | 201112221013 | 202001220223 |
| Base 4 | 1331101334 | 2000212134 |
| Base 5 | 131011225 | 132032225 |
| Base 6 | 24255316 | 24533556 |
| Base 7 | 10430057 | 10556337 |
| Base 8 | 3724378 | 4011478 |
| Base 9 | 2148719 | 2205689 |
| Base 10 | 12828710 | 13168710 |
| Base 11 | 8842511 | 8aa3611 |
| Base 12 | 622a712 | 6425b12 |
| Base 13 | 4651313 | 47c2a13 |
| Base 14 | 34a7514 | 35dc314 |
| Base 15 | 2802715 | 2904215 |
| Base 16 | 1f51f16 | 2026716 |