Q: Is 407,421 a Prime Number?
A: No, 407,421 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 407421 can be evenly divided by 1 3 7 9 21 29 63 87 203 223 261 609 669 1,561 1,827 2,007 4,683 6,467 14,049 19,401 45,269 58,203 135,807 and 407,421, with no remainder.
Since 407,421 cannot be divided by just 1 and 407,421, it is not a prime number.