Compare 1621 vs 1625
| Property | 1621 | 1625 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 2 |
| Total factors | 1 | 4 |
| Prime factorization | 16211 | 53 × 131 |
| Prime factorization | 1621 | 5 × 5 × 5 × 13 |
| Divisors count | 2 | 8 |
| Divisors | 1, 1621 | 1, 5, 13, 25, 65, 125, 325, 1625 |
| Number of properties | 8 | 0 |
| Chen primes | 163rd | |
| Harmonic primes | 89th | |
| Long primes | 101st | |
| Primes | 257th | |
| Pythagorean primes | 123rd | |
| Sexy primes (1st member) | 111th | |
| Super primes | 55th | |
| Twin primes (2nd member) | 52nd | |
| Roman numberals | MDCXXI | MDCXXV |
| Base 2 | 110010101012 | 110010110012 |
| Base 3 | 20200013 | 20200123 |
| Base 4 | 1211114 | 1211214 |
| Base 5 | 224415 | 230005 |
| Base 6 | 113016 | 113056 |
| Base 7 | 45047 | 45117 |
| Base 8 | 31258 | 31318 |
| Base 9 | 22019 | 22059 |
| Base 10 | 162110 | 162510 |
| Base 11 | 124411 | 124811 |
| Base 12 | b3112 | b3512 |
| Base 13 | 97913 | 98013 |
| Base 14 | 83b14 | 84114 |
| Base 15 | 73115 | 73515 |
| Base 16 | 65516 | 65916 |