Divisor 12951

To determine if any number is divisible by 12951, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 9 and 1439 - then it is divisible by 12951.

The following tests must pass:

• Test if a number is divisible by 9
• The "Daelf Derechef Test" for Divisibility by 1439

Easy!