Q: Is 635,421 a Prime Number?
A: No, 635,421 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 635421 can be evenly divided by 1 3 23 69 9,209 27,627 211,807 and 635,421, with no remainder.
Since 635,421 cannot be divided by just 1 and 635,421, it is not a prime number.