Q: Is 671,531 a Prime Number?
A: No, 671,531 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 671531 can be evenly divided by 1 7 23 43 97 161 301 679 989 2,231 4,171 6,923 15,617 29,197 95,933 and 671,531, with no remainder.
Since 671,531 cannot be divided by just 1 and 671,531, it is not a prime number.