Q: Is 671,538 a Prime Number?
A: No, 671,538 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 671538 can be evenly divided by 1 2 3 6 7 14 21 42 59 118 177 271 354 413 542 813 826 1,239 1,626 1,897 2,478 3,794 5,691 11,382 15,989 31,978 47,967 95,934 111,923 223,846 335,769 and 671,538, with no remainder.
Since 671,538 cannot be divided by just 1 and 671,538, it is not a prime number.