Q: Is 421,218 a Prime Number?
A: No, 421,218 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 421218 can be evenly divided by 1 2 3 6 7 9 14 18 21 42 63 126 3,343 6,686 10,029 20,058 23,401 30,087 46,802 60,174 70,203 140,406 210,609 and 421,218, with no remainder.
Since 421,218 cannot be divided by just 1 and 421,218, it is not a prime number.