Compare 12 vs 13
| Property | 12 | 13 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 2 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 22 × 31 | 131 |
| Prime factorization | 2 × 2 × 3 | 13 |
| Divisors count | 6 | 2 |
| Divisors | 1, 2, 3, 4, 6, 12 | 1, 13 |
| Number of properties | 0 | 32 |
| Centered square primes | 2nd | |
| Chen primes | 6th | |
| Cousin primes (1st member) | 3rd | |
| Cuban primes 2 | 1st | |
| Emirps | 1st | |
| Fibonacci primes | 4th | |
| Happy primes | 2nd | |
| Harmonic primes | 2nd | |
| Left-truncatable primes | 5th | |
| Lucky primes | 3rd | |
| Multiplicative primes | 5th | |
| Pierpont primes | 5th | |
| Primes | 6th | |
| Prime quadruplets (2nd member) | 2nd | |
| Prime quadruplets (4th member) | 1st | |
| Prime quintuplet 1s (3rd member) | 1st | |
| Prime quintuplet 2s (2nd member) | 2nd | |
| Prime quintuplet 2s (4th member) | 1st | |
| Prime sextuplets (3rd member) | 1st | |
| Prime triplets (1st member) | 4th | |
| Prime triplets (2nd member) | 3rd | |
| Prime triplets (3rd member) | 2nd | |
| Proth primes | 3rd | |
| Pythagorean primes | 2nd | |
| Sexy primes (1st member) | 4th | |
| Sexy primes (2nd member) | 2nd | |
| Sexy prime triplets (2nd member) | 2nd | |
| Solinas primes | 5th | |
| Thabit primes of the 2nd kind | 2nd | |
| Twin primes (2nd member) | 3rd | |
| Ulam primes | 4th | |
| Wilson primes | 2nd | |
| Roman numberals | XII | XIII |
| Base 2 | 11002 | 11012 |
| Base 3 | 1103 | 1113 |
| Base 4 | 304 | 314 |
| Base 5 | 225 | 235 |
| Base 6 | 206 | 216 |
| Base 7 | 157 | 167 |
| Base 8 | 148 | 158 |
| Base 9 | 139 | 149 |
| Base 10 | 1210 | 1310 |
| Base 11 | 1111 | 1211 |
| Base 12 | 1012 | 1112 |
| Base 13 | c13 | 1013 |
| Base 14 | c14 | d14 |
| Base 15 | c15 | d15 |
| Base 16 | c16 | d16 |