Q: Is 642,004 a Prime Number?
A: No, 642,004 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 642004 can be evenly divided by 1 2 4 11 22 44 14,591 29,182 58,364 160,501 321,002 and 642,004, with no remainder.
Since 642,004 cannot be divided by just 1 and 642,004, it is not a prime number.