The folowing table expresses '4186' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR13 | DR12 | DR11 | DR10 | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1000001011010 | 101 | 10 | 1 | |||||||||
| 3 | 12202001 | 22,11 | 2 | ||||||||||
| 4 | 1001122 | 13,10 | 1 | ||||||||||
| 5 | 113221 | 20 | 2 | ||||||||||
| 6 | 31214 | 15,10 | 1 | ||||||||||
| 7 | 15130 | 13 | 4 | ||||||||||
| 8 | 10132 | 7 | |||||||||||
| 9 | 5661 | 20 | 2 | ||||||||||
| 10 | 4186 | 19,10 | 1 | ||||||||||
| 11 | 3166 | 15 | 6 | ||||||||||
| 12 | 250A | 15 | 6 | ||||||||||
| 13 | 1BA0 | 19 | A | ||||||||||
| 14 | 1750 | D | |||||||||||
| 15 | 1391 | E | |||||||||||
| 16 | 105A | 10 | 1 |
Factors: 2 * 7 * 13 * 23
4 is the sum of the counting numbers from 1 to 91 (See 'The Sum/Product of the First N Counting Numbers').