Compare 1405 vs 1409
| Property | 1405 | 1409 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 2811 | 14091 |
| Prime factorization | 5 × 281 | 1409 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 281, 1405 | 1, 1409 |
| Number of properties | 1 | 8 |
| Chen primes | 146th | |
| Emirps | 66th | |
| Isolated primes | 132nd | |
| Primes | 223rd | |
| Proth primes | 20th | |
| Pythagorean primes | 110th | |
| Semiprimes | 418th | |
| Sophie germain primes | 46th | |
| Super primes | 48th | |
| Roman numberals | MCDV | MCDIX |
| Base 2 | 101011111012 | 101100000012 |
| Base 3 | 12210013 | 12210123 |
| Base 4 | 1113314 | 1120014 |
| Base 5 | 211105 | 211145 |
| Base 6 | 103016 | 103056 |
| Base 7 | 40457 | 40527 |
| Base 8 | 25758 | 26018 |
| Base 9 | 18319 | 18359 |
| Base 10 | 140510 | 140910 |
| Base 11 | 106811 | 107111 |
| Base 12 | 99112 | 99512 |
| Base 13 | 84113 | 84513 |
| Base 14 | 72514 | 72914 |
| Base 15 | 63a15 | 63e15 |
| Base 16 | 57d16 | 58116 |