Q: Is 642,490 a Prime Number?
A: No, 642,490 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 642490 can be evenly divided by 1 2 5 10 47 94 235 470 1,367 2,734 6,835 13,670 64,249 128,498 321,245 and 642,490, with no remainder.
Since 642,490 cannot be divided by just 1 and 642,490, it is not a prime number.