Q: Is 421,990 a Prime Number?
A: No, 421,990 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 421990 can be evenly divided by 1 2 5 10 19 38 95 190 2,221 4,442 11,105 22,210 42,199 84,398 210,995 and 421,990, with no remainder.
Since 421,990 cannot be divided by just 1 and 421,990, it is not a prime number.