Q: Is 420,340 a Prime Number?
A: No, 420,340 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 420340 can be evenly divided by 1 2 4 5 10 20 21,017 42,034 84,068 105,085 210,170 and 420,340, with no remainder.
Since 420,340 cannot be divided by just 1 and 420,340, it is not a prime number.