Kaprekar Constant Tool (6174)
Explore the Kaprekar routine for any 4-digit number. Watch the step-by-step process as it converges to the mysterious constant 6174.
Steps to Reach 6174
3.00
Number of iterations needed
Step-by-Step Process
5432 - 2345 = 3087 8730 - 0378 = 8352 8532 - 2358 = 6174
Each subtraction in the Kaprekar routine
Starting Number
3524
The 4-digit input number
Number of Iterations
3.00
Total steps performed
Final Constant
6174
The Kaprekar constant