Compare 142 vs 151
| Property | 142 | 151 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 21 × 711 | 1511 |
| Prime factorization | 2 × 71 | 151 |
| Divisors count | 4 | 2 |
| Divisors | 1, 2, 71, 142 | 1, 151 |
| Number of properties | 1 | 9 |
| Additive primes | 20th | |
| Centered decagonal primes | 5th | |
| Lucky primes | 11th | |
| Multiplicative primes | 11th | |
| Palindromic primes | 8th | |
| Primes | 36th | |
| Semiprimes | 47th | |
| Sexy primes (1st member) | 21st | |
| Sexy prime triplets (1st member) | 12th | |
| Twin primes (2nd member) | 12th | |
| Roman numberals | CXLII | CLI |
| Base 2 | 100011102 | 100101112 |
| Base 3 | 120213 | 121213 |
| Base 4 | 20324 | 21134 |
| Base 5 | 10325 | 11015 |
| Base 6 | 3546 | 4116 |
| Base 7 | 2627 | 3047 |
| Base 8 | 2168 | 2278 |
| Base 9 | 1679 | 1779 |
| Base 10 | 14210 | 15110 |
| Base 11 | 11a11 | 12811 |
| Base 12 | ba12 | 10712 |
| Base 13 | ac13 | b813 |
| Base 14 | a214 | ab14 |
| Base 15 | 9715 | a115 |
| Base 16 | 8e16 | 9716 |