Compare 681221 vs 681521
| Property | 681221 | 681521 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6812211 | 6815211 |
| Prime factorization | 681221 | 681521 |
| Divisors count | 2 | 2 |
| Divisors | 1, 681221 | 1, 681521 |
| Number of properties | 4 | 4 |
| Additive primes | 21520th | |
| Chen primes | 21539th | 21546th |
| Isolated primes | 43270th | |
| Primes | 55155th | 55180th |
| Sophie germain primes | 5597th | |
| Twin primes (1st member) | 5948th | |
| Roman numberals | ||
| Base 2 | 101001100101000001012 | 101001100110001100012 |
| Base 3 | 10211211101023 | 10211212121123 |
| Base 4 | 22121100114 | 22121203014 |
| Base 5 | 1332443415 | 1333020415 |
| Base 6 | 223334456 | 223351056 |
| Base 7 | 55350327 | 55356417 |
| Base 8 | 24624058 | 24630618 |
| Base 9 | 12474129 | 12477759 |
| Base 10 | 68122110 | 68152110 |
| Base 11 | 4258a211 | 42604511 |
| Base 12 | 28a28512 | 28a49512 |
| Base 13 | 1ab0b813 | 1ab28913 |
| Base 14 | 13a38914 | 13a52114 |
| Base 15 | d6c9b15 | d6deb15 |
| Base 16 | a650516 | a663116 |