Compare 1231 vs 1291
| Property | 1231 | 1291 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 12311 | 12911 |
| Prime factorization | 1231 | 1291 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1231 | 1, 1291 |
| Number of properties | 6 | 9 |
| Additive primes | 108th | 113th |
| Chen primes | 137th | |
| Emirps | 56th | |
| Harmonic primes | 73rd | |
| Long primes | 80th | |
| Lucky primes | 52nd | 54th |
| Primes | 202nd | 210th |
| Sexy primes (1st member) | 88th | 91st |
| Sexy prime triplets (1st member) | 35th | |
| Twin primes (2nd member) | 42nd | 44th |
| Roman numberals | MCCXXXI | MCCXCI |
| Base 2 | 100110011112 | 101000010112 |
| Base 3 | 12001213 | 12022113 |
| Base 4 | 1030334 | 1100234 |
| Base 5 | 144115 | 201315 |
| Base 6 | 54116 | 55516 |
| Base 7 | 34067 | 35237 |
| Base 8 | 23178 | 24138 |
| Base 9 | 16179 | 16849 |
| Base 10 | 123110 | 129110 |
| Base 11 | a1a11 | a7411 |
| Base 12 | 86712 | 8b712 |
| Base 13 | 73913 | 78413 |
| Base 14 | 63d14 | 68314 |
| Base 15 | 57115 | 5b115 |
| Base 16 | 4cf16 | 50b16 |