Q: Is 625,428 a Prime Number?
A: No, 625,428 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 625428 can be evenly divided by 1 2 3 4 6 9 12 18 27 36 54 108 5,791 11,582 17,373 23,164 34,746 52,119 69,492 104,238 156,357 208,476 312,714 and 625,428, with no remainder.
Since 625,428 cannot be divided by just 1 and 625,428, it is not a prime number.