Compare 1280 vs 1283
| Property | 1280 | 1283 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 2 | 1 |
| Total factors | 9 | 1 |
| Prime factorization | 28 × 51 | 12831 |
| Prime factorization | 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 | 1283 |
| Divisors count | 18 | 2 |
| Divisors | 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280 | 1, 1283 |
| Number of properties | 0 | 12 |
| Chen primes | 135th | |
| Cousin primes (2nd member) | 46th | |
| Emirps | 61st | |
| Harmonic primes | 72nd | |
| Isolated primes | 123rd | |
| Left-truncatable primes | 56th | |
| Primes | 208th | |
| Prime triplets (3rd member) | 33rd | |
| Safe primes | 28th | |
| Sexy primes (1st member) | 90th | |
| Sexy primes (2nd member) | 89th | |
| Sexy prime triplets (2nd member) | 34th | |
| Roman numberals | MCCLXXX | MCCLXXXIII |
| Base 2 | 101000000002 | 101000000112 |
| Base 3 | 12021023 | 12021123 |
| Base 4 | 1100004 | 1100034 |
| Base 5 | 201105 | 201135 |
| Base 6 | 55326 | 55356 |
| Base 7 | 35067 | 35127 |
| Base 8 | 24008 | 24038 |
| Base 9 | 16729 | 16759 |
| Base 10 | 128010 | 128310 |
| Base 11 | a6411 | a6711 |
| Base 12 | 8a812 | 8ab12 |
| Base 13 | 77613 | 77913 |
| Base 14 | 67614 | 67914 |
| Base 15 | 5a515 | 5a815 |
| Base 16 | 50016 | 50316 |