Q: Is 642,475 a Prime Number?
A: No, 642,475 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 642475 can be evenly divided by 1 5 25 31 155 775 829 4,145 20,725 25,699 128,495 and 642,475, with no remainder.
Since 642,475 cannot be divided by just 1 and 642,475, it is not a prime number.