Compare 1721 vs 1724
| Property | 1721 | 1724 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 2 |
| Total factors | 1 | 3 |
| Prime factorization | 17211 | 22 × 4311 |
| Prime factorization | 1721 | 2 × 2 × 431 |
| Divisors count | 2 | 6 |
| Divisors | 1, 1721 | 1, 2, 4, 431, 862, 1724 |
| Number of properties | 6 | 0 |
| Additive primes | 143rd | |
| Chen primes | 169th | |
| Primes | 268th | |
| Pythagorean primes | 130th | |
| Twin primes (1st member) | 55th | |
| Ulam primes | 25th | |
| Roman numberals | MDCCXXI | MDCCXXIV |
| Base 2 | 110101110012 | 110101111002 |
| Base 3 | 21002023 | 21002123 |
| Base 4 | 1223214 | 1223304 |
| Base 5 | 233415 | 233445 |
| Base 6 | 115456 | 115526 |
| Base 7 | 50067 | 50127 |
| Base 8 | 32718 | 32748 |
| Base 9 | 23229 | 23259 |
| Base 10 | 172110 | 172410 |
| Base 11 | 132511 | 132811 |
| Base 12 | bb512 | bb812 |
| Base 13 | a2513 | a2813 |
| Base 14 | 8ad14 | 8b214 |
| Base 15 | 79b15 | 79e15 |
| Base 16 | 6b916 | 6bc16 |