The folowing table expresses '405' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|
| 2 | 110010101 | 101 | 10 | 1 | |||||
| 3 | 120000 | 10 | 1 | ||||||
| 4 | 12111 | 12 | 3 | ||||||
| 5 | 3110 | 10 | 1 | ||||||
| 6 | 1513 | 14 | 5 | ||||||
| 7 | 1116 | 12 | 3 | ||||||
| 8 | 625 | 15 | 6 | ||||||
| 9 | 500 | 5 | |||||||
| 10 | 405 | 9 | |||||||
| 11 | 339 | 14 | 5 | ||||||
| 12 | 299 | 18 | 9 | ||||||
| 13 | 252 | 9 | |||||||
| 14 | 20D | 11 | 2 | ||||||
| 15 | 1C0 | D | |||||||
| 16 | 195 | F |
Factors: 34 * 5
405 is in the Pythagorean Triple: (405, 3268, 3293).