Q: Is 402,021 a Prime Number?
A: No, 402,021 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 402021 can be evenly divided by 1 3 9 19 57 171 2,351 7,053 21,159 44,669 134,007 and 402,021, with no remainder.
Since 402,021 cannot be divided by just 1 and 402,021, it is not a prime number.