Q: Is 840,421 a Prime Number?
A: No, 840,421 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 840421 can be evenly divided by 1 53 101 157 5,353 8,321 15,857 and 840,421, with no remainder.
Since 840,421 cannot be divided by just 1 and 840,421, it is not a prime number.