Step 1: Divide the number into separate digits:
24612 => 2 4 6 1 2
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
2 to 4 = 2
4 to 6 = 2
6 to 1 = 5
1 to 2 = 1
2 to 2 = 0
Step 3: Combine the filters to a string:
2 2 5 1 0 = 22510