It depends on which place value is given!
100,000
There are 504 such numbers.
12
823543
6
5040 different 4 digit numbers can be formed with the digits 123456789. This is assuming that no digits are repeated with each combination.
9999
100,000
There are 504 such numbers.
512
12
There are 5! = 120 such numbers.
840
823543
There are 60480 numbers.
6
81