Q: Is 743,421 a Prime Number?
A: No, 743,421 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 743421 can be evenly divided by 1 3 7 21 35,401 106,203 247,807 and 743,421, with no remainder.
Since 743,421 cannot be divided by just 1 and 743,421, it is not a prime number.