Step 1: Divide the number into separate digits:
12285 => 1 2 2 8 5
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
1 to 2 = 1
2 to 2 = 0
2 to 8 = 6
8 to 5 = 3
5 to 1 = 4
Step 3: Combine the filters to a string:
1 0 6 3 4 = 10634