Q: Is 642,990 a Prime Number?
A: No, 642,990 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 642990 can be evenly divided by 1 2 3 5 6 10 15 30 21,433 42,866 64,299 107,165 128,598 214,330 321,495 and 642,990, with no remainder.
Since 642,990 cannot be divided by just 1 and 642,990, it is not a prime number.