Compare 1721 vs 1801
| Property | 1721 | 1801 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 17211 | 18011 |
| Prime factorization | 1721 | 1801 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1721 | 1, 1801 |
| Number of properties | 6 | 7 |
| Additive primes | 143rd | |
| Chen primes | 169th | 174th |
| Cuban primes 1 | 13th | |
| Harmonic primes | 99th | |
| Isolated primes | 168th | |
| Lucky primes | 66th | |
| Primes | 268th | 279th |
| Pythagorean primes | 130th | 136th |
| Twin primes (1st member) | 55th | |
| Ulam primes | 25th | |
| Roman numberals | MDCCXXI | MDCCCI |
| Base 2 | 110101110012 | 111000010012 |
| Base 3 | 21002023 | 21102013 |
| Base 4 | 1223214 | 1300214 |
| Base 5 | 233415 | 242015 |
| Base 6 | 115456 | 122016 |
| Base 7 | 50067 | 51527 |
| Base 8 | 32718 | 34118 |
| Base 9 | 23229 | 24219 |
| Base 10 | 172110 | 180110 |
| Base 11 | 132511 | 139811 |
| Base 12 | bb512 | 106112 |
| Base 13 | a2513 | a8713 |
| Base 14 | 8ad14 | 92914 |
| Base 15 | 79b15 | 80115 |
| Base 16 | 6b916 | 70916 |