Step 1: Divide the number into separate digits:
78419 => 7 8 4 1 9
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
7 to 8 = 1
8 to 4 = 4
4 to 1 = 3
1 to 9 = 8
9 to 7 = 2
Step 3: Combine the filters to a string:
1 4 3 8 2 = 14382