Q: Is 320,421 a Prime Number?
A: No, 320,421 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 320421 can be evenly divided by 1 3 29 87 127 381 841 2,523 3,683 11,049 106,807 and 320,421, with no remainder.
Since 320,421 cannot be divided by just 1 and 320,421, it is not a prime number.