Divisor 24561

To determine if any number is divisible by 24561, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 9 and 2729 - then it is divisible by 24561.

The following tests must pass:

• Test if a number is divisible by 9
• The "Igor Bobar Test" for Divisibility by 2729

Easy!