Compare 821 vs 1277
| Property | 821 | 1277 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 8211 | 12771 |
| Prime factorization | 821 | 1277 |
| Divisors count | 2 | 2 |
| Divisors | 1, 821 | 1, 1277 |
| Number of properties | 10 | 10 |
| Additive primes | 75th | 111th |
| Chen primes | 97th | 134th |
| Good primes | 40th | 50th |
| Happy primes | 41st | |
| Long primes | 50th | |
| Primes | 142nd | 206th |
| Prime quadruplets (1st member) | 5th | |
| Prime triplets (1st member) | 25th | 33rd |
| Pythagorean primes | 69th | 102nd |
| Sexy primes (1st member) | 64th | 89th |
| Sexy prime triplets (1st member) | 34th | |
| Twin primes (1st member) | 32nd | 43rd |
| Roman numberals | DCCCXXI | MCCLXXVII |
| Base 2 | 11001101012 | 100111111012 |
| Base 3 | 10101023 | 12020223 |
| Base 4 | 303114 | 1033314 |
| Base 5 | 112415 | 201025 |
| Base 6 | 34456 | 55256 |
| Base 7 | 22527 | 35037 |
| Base 8 | 14658 | 23758 |
| Base 9 | 11129 | 16689 |
| Base 10 | 82110 | 127710 |
| Base 11 | 68711 | a6111 |
| Base 12 | 58512 | 8a512 |
| Base 13 | 4b213 | 77313 |
| Base 14 | 42914 | 67314 |
| Base 15 | 39b15 | 5a215 |
| Base 16 | 33516 | 4fd16 |