Q: Is 423,820 a Prime Number?
A: No, 423,820 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 423820 can be evenly divided by 1 2 4 5 10 20 21,191 42,382 84,764 105,955 211,910 and 423,820, with no remainder.
Since 423,820 cannot be divided by just 1 and 423,820, it is not a prime number.