Meet Dattatreya Ramchandra Kaprekar: The Indian mathematician who discovered a ‘ghost number’ that always returns to itself

A humble schoolteacher, Dattatreya Ramchandra Kaprekar, discovered the remarkable 6174 constant through simple number experimentation. This number, reached by a specific digit rearrangement process, became a ‘ghost number’ due to its fixed-point behavior. Initially overlooked, Kaprekar’s work gained international acclaim, influencing math education and computer science with its elegant demonstration of iterative computation.