Compare 1231 vs 1240
| Property | 1231 | 1240 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 5 |
| Prime factorization | 12311 | 23 × 51 × 311 |
| Prime factorization | 1231 | 2 × 2 × 2 × 5 × 31 |
| Divisors count | 2 | 16 |
| Divisors | 1, 1231 | 1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240 |
| Number of properties | 6 | 0 |
| Additive primes | 108th | |
| Emirps | 56th | |
| Lucky primes | 52nd | |
| Primes | 202nd | |
| Sexy primes (1st member) | 88th | |
| Twin primes (2nd member) | 42nd | |
| Roman numberals | MCCXXXI | MCCXL |
| Base 2 | 100110011112 | 100110110002 |
| Base 3 | 12001213 | 12002213 |
| Base 4 | 1030334 | 1031204 |
| Base 5 | 144115 | 144305 |
| Base 6 | 54116 | 54246 |
| Base 7 | 34067 | 34217 |
| Base 8 | 23178 | 23308 |
| Base 9 | 16179 | 16279 |
| Base 10 | 123110 | 124010 |
| Base 11 | a1a11 | a2811 |
| Base 12 | 86712 | 87412 |
| Base 13 | 73913 | 74513 |
| Base 14 | 63d14 | 64814 |
| Base 15 | 57115 | 57a15 |
| Base 16 | 4cf16 | 4d816 |