Q: Is 421,838 a Prime Number?
A: No, 421,838 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 421838 can be evenly divided by 1 2 17 19 34 38 323 646 653 1,306 11,101 12,407 22,202 24,814 210,919 and 421,838, with no remainder.
Since 421,838 cannot be divided by just 1 and 421,838, it is not a prime number.