Compare 1231 vs 1381
| Property | 1231 | 1381 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 12311 | 13811 |
| Prime factorization | 1231 | 1381 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1231 | 1, 1381 |
| Number of properties | 6 | 7 |
| Additive primes | 108th | 122nd |
| Chen primes | 144th | |
| Emirps | 56th | 64th |
| Isolated primes | 130th | |
| Long primes | 86th | |
| Lucky primes | 52nd | |
| Primes | 202nd | 221st |
| Pythagorean primes | 109th | |
| Sexy primes (1st member) | 88th | |
| Twin primes (2nd member) | 42nd | |
| Roman numberals | MCCXXXI | MCCCLXXXI |
| Base 2 | 100110011112 | 101011001012 |
| Base 3 | 12001213 | 12200113 |
| Base 4 | 1030334 | 1112114 |
| Base 5 | 144115 | 210115 |
| Base 6 | 54116 | 102216 |
| Base 7 | 34067 | 40127 |
| Base 8 | 23178 | 25458 |
| Base 9 | 16179 | 18049 |
| Base 10 | 123110 | 138110 |
| Base 11 | a1a11 | 104611 |
| Base 12 | 86712 | 97112 |
| Base 13 | 73913 | 82313 |
| Base 14 | 63d14 | 70914 |
| Base 15 | 57115 | 62115 |
| Base 16 | 4cf16 | 56516 |