Compare 420 vs 421
| Property | 420 | 421 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 4 | 1 |
| Total factors | 5 | 1 |
| Prime factorization | 22 × 31 × 51 × 71 | 4211 |
| Prime factorization | 2 × 2 × 3 × 5 × 7 | 421 |
| Divisors count | 24 | 2 |
| Divisors | 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420 | 1, 421 |
| Number of properties | 0 | 6 |
| Additive primes | 48th | |
| Centered square primes | 8th | |
| Lucky primes | 23rd | |
| Primes | 82nd | |
| Pythagorean primes | 40th | |
| Twin primes (2nd member) | 22nd | |
| Roman numberals | CDXX | CDXXI |
| Base 2 | 1101001002 | 1101001012 |
| Base 3 | 1201203 | 1201213 |
| Base 4 | 122104 | 122114 |
| Base 5 | 31405 | 31415 |
| Base 6 | 15406 | 15416 |
| Base 7 | 11407 | 11417 |
| Base 8 | 6448 | 6458 |
| Base 9 | 5169 | 5179 |
| Base 10 | 42010 | 42110 |
| Base 11 | 35211 | 35311 |
| Base 12 | 2b012 | 2b112 |
| Base 13 | 26413 | 26513 |
| Base 14 | 22014 | 22114 |
| Base 15 | 1d015 | 1d115 |
| Base 16 | 1a416 | 1a516 |