Q: Is 635,401 a Prime Number?
A: No, 635,401 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 635401 can be evenly divided by 1 13 37 481 1,321 17,173 48,877 and 635,401, with no remainder.
Since 635,401 cannot be divided by just 1 and 635,401, it is not a prime number.