The answer is 1000000.
First off, we have to understand that the number is formed of ones,tens,hundreds,thousands etc.
Where ones is the first number from right to left, tens is the second, the list goes on. As they are named, they represent different value.
To find the value,we multiply the number with it places. For example, if 3 is in the tens,we multiply it by 10 making the value 30.
In this case, 1 is the millions, thus we will have to multiply the value by 1000000, making the place value 1000000.
Hope it helps!