Compare 1291 vs 1801
| Property | 1291 | 1801 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 12911 | 18011 |
| Prime factorization | 1291 | 1801 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1291 | 1, 1801 |
| Number of properties | 9 | 7 |
| Additive primes | 113th | |
| Chen primes | 137th | 174th |
| Cuban primes 1 | 13th | |
| Harmonic primes | 73rd | 99th |
| Isolated primes | 168th | |
| Long primes | 80th | |
| Lucky primes | 54th | 66th |
| Primes | 210th | 279th |
| Pythagorean primes | 136th | |
| Sexy primes (1st member) | 91st | |
| Sexy prime triplets (1st member) | 35th | |
| Twin primes (2nd member) | 44th | |
| Roman numberals | MCCXCI | MDCCCI |
| Base 2 | 101000010112 | 111000010012 |
| Base 3 | 12022113 | 21102013 |
| Base 4 | 1100234 | 1300214 |
| Base 5 | 201315 | 242015 |
| Base 6 | 55516 | 122016 |
| Base 7 | 35237 | 51527 |
| Base 8 | 24138 | 34118 |
| Base 9 | 16849 | 24219 |
| Base 10 | 129110 | 180110 |
| Base 11 | a7411 | 139811 |
| Base 12 | 8b712 | 106112 |
| Base 13 | 78413 | a8713 |
| Base 14 | 68314 | 92914 |
| Base 15 | 5b115 | 80115 |
| Base 16 | 50b16 | 70916 |