Step 1: Divide the number into separate digits:
41582 => 4 1 5 8 2
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
4 to 1 = 3
1 to 5 = 4
5 to 8 = 3
8 to 2 = 6
2 to 4 = 2
Step 3: Combine the filters to a string:
3 4 3 6 2 = 34362