Compare 1399 vs 1405
| Property | 1399 | 1405 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 13991 | 51 × 2811 |
| Prime factorization | 1399 | 5 × 281 |
| Divisors count | 2 | 4 |
| Divisors | 1, 1399 | 1, 5, 281, 1405 |
| Number of properties | 6 | 1 |
| Chen primes | 145th | |
| Emirps | 65th | |
| Good primes | 52nd | |
| Harmonic primes | 76th | |
| Isolated primes | 131st | |
| Primes | 222nd | |
| Semiprimes | 418th | |
| Roman numberals | MCCCXCIX | MCDV |
| Base 2 | 101011101112 | 101011111012 |
| Base 3 | 12202113 | 12210013 |
| Base 4 | 1113134 | 1113314 |
| Base 5 | 210445 | 211105 |
| Base 6 | 102516 | 103016 |
| Base 7 | 40367 | 40457 |
| Base 8 | 25678 | 25758 |
| Base 9 | 18249 | 18319 |
| Base 10 | 139910 | 140510 |
| Base 11 | 106211 | 106811 |
| Base 12 | 98712 | 99112 |
| Base 13 | 83813 | 84113 |
| Base 14 | 71d14 | 72514 |
| Base 15 | 63415 | 63a15 |
| Base 16 | 57716 | 57d16 |