Compare 1721 vs 2129
| Property | 1721 | 2129 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 17211 | 21291 |
| Prime factorization | 1721 | 2129 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1721 | 1, 2129 |
| Number of properties | 6 | 5 |
| Additive primes | 143rd | |
| Chen primes | 169th | 196th |
| Primes | 268th | 320th |
| Pythagorean primes | 130th | 155th |
| Sophie germain primes | 65th | |
| Twin primes (1st member) | 55th | 66th |
| Ulam primes | 25th | |
| Roman numberals | MDCCXXI | MMCXXIX |
| Base 2 | 110101110012 | 1000010100012 |
| Base 3 | 21002023 | 22202123 |
| Base 4 | 1223214 | 2011014 |
| Base 5 | 233415 | 320045 |
| Base 6 | 115456 | 135056 |
| Base 7 | 50067 | 61317 |
| Base 8 | 32718 | 41218 |
| Base 9 | 23229 | 28259 |
| Base 10 | 172110 | 212910 |
| Base 11 | 132511 | 166611 |
| Base 12 | bb512 | 129512 |
| Base 13 | a2513 | c7a13 |
| Base 14 | 8ad14 | ac114 |
| Base 15 | 79b15 | 96e15 |
| Base 16 | 6b916 | 85116 |