5 hundred thausand 12 ten thausand 1 thausand 15 tens and 7 ones in standar form

The best to do this is like this:

5 hundred thousand would be 500,000

12 of 10,000 (should be 12,000)

1,000 tens is 10,000 plus 15 tens is 150 so this is 10,150

7 ones

522,157