Compare 415 vs 421
| Property | 415 | 421 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 831 | 4211 |
| Prime factorization | 5 × 83 | 421 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 83, 415 | 1, 421 |
| Number of properties | 1 | 6 |
| Additive primes | 48th | |
| Centered square primes | 8th | |
| Lucky primes | 23rd | |
| Primes | 82nd | |
| Pythagorean primes | 40th | |
| Semiprimes | 131st | |
| Twin primes (2nd member) | 22nd | |
| Roman numberals | CDXV | CDXXI |
| Base 2 | 1100111112 | 1101001012 |
| Base 3 | 1201013 | 1201213 |
| Base 4 | 121334 | 122114 |
| Base 5 | 31305 | 31415 |
| Base 6 | 15316 | 15416 |
| Base 7 | 11327 | 11417 |
| Base 8 | 6378 | 6458 |
| Base 9 | 5119 | 5179 |
| Base 10 | 41510 | 42110 |
| Base 11 | 34811 | 35311 |
| Base 12 | 2a712 | 2b112 |
| Base 13 | 25c13 | 26513 |
| Base 14 | 21914 | 22114 |
| Base 15 | 1ca15 | 1d115 |
| Base 16 | 19f16 | 1a516 |