Q: Is 263,421 a Prime Number?
A: No, 263,421 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 263421 can be evenly divided by 1 3 9 29,269 87,807 and 263,421, with no remainder.
Since 263,421 cannot be divided by just 1 and 263,421, it is not a prime number.