Q: Is 2,405,421 a Prime Number?
A: No, 2,405,421 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 2405421 can be evenly divided by 1 3 9 241 723 1,109 2,169 3,327 9,981 267,269 801,807 and 2,405,421, with no remainder.
Since 2,405,421 cannot be divided by just 1 and 2,405,421, it is not a prime number.