Given a hash, define a number?

Question

Hashing

Before playing a random number from 0 to 999999, given hash of the game, such as: 67f21826156757904b59aa72b3cc06d6131236fb16d7d172ba14848c4b6970157878e9b67eb68f7f9b96ffaeaed10c2fd0d9e714d590af87b94291cc47e0187a, you need to determine this number.

Answer 1

Run through the hash generation algorithm all numbers from 0 to 999999 and compare with the hash.
In the case of a good hash function and a very large variety of input data, the problem is unsolvable.