Q: Is 642,125 a Prime Number?
A: No, 642,125 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 642125 can be evenly divided by 1 5 11 25 55 125 275 467 1,375 2,335 5,137 11,675 25,685 58,375 128,425 and 642,125, with no remainder.
Since 642,125 cannot be divided by just 1 and 642,125, it is not a prime number.