Q: Is 671,418 a Prime Number?
A: No, 671,418 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 671418 can be evenly divided by 1 2 3 6 9 11 18 22 33 66 99 198 3,391 6,782 10,173 20,346 30,519 37,301 61,038 74,602 111,903 223,806 335,709 and 671,418, with no remainder.
Since 671,418 cannot be divided by just 1 and 671,418, it is not a prime number.