Q: Is 625,604 a Prime Number?
A: No, 625,604 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 625604 can be evenly divided by 1 2 4 7 14 28 22,343 44,686 89,372 156,401 312,802 and 625,604, with no remainder.
Since 625,604 cannot be divided by just 1 and 625,604, it is not a prime number.