Compare 81281 vs 81409
| Property | 81281 | 81409 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 812811 | 814091 |
| Prime factorization | 81281 | 81409 |
| Divisors count | 2 | 2 |
| Divisors | 1, 81281 | 1, 81409 |
| Number of properties | 7 | 5 |
| Centered decagonal primes | 61st | |
| Chen primes | 3597th | |
| Harmonic primes | 3002nd | 3007th |
| Isolated primes | 5915th | |
| Primes | 7953rd | 7966th |
| Proth primes | 92nd | |
| Pythagorean primes | 3963rd | 3969th |
| Sophie germain primes | 988th | |
| Twin primes (1st member) | 1025th | |
| Roman numberals | ||
| Base 2 | 100111101100000012 | 100111110000000012 |
| Base 3 | 110101111023 | 110102000113 |
| Base 4 | 1033120014 | 1033200014 |
| Base 5 | 101001115 | 101011145 |
| Base 6 | 14241456 | 14245216 |
| Base 7 | 4556547 | 4562267 |
| Base 8 | 2366018 | 2370018 |
| Base 9 | 1334429 | 1336049 |
| Base 10 | 8128110 | 8140910 |
| Base 11 | 5608211 | 5618911 |
| Base 12 | 3b05512 | 3b14112 |
| Base 13 | 2acc513 | 2b09313 |
| Base 14 | 2189b14 | 2194d14 |
| Base 15 | 1913b15 | 191c415 |
| Base 16 | 13d8116 | 13e0116 |