Q: Is 671,740 a Prime Number?
A: No, 671,740 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 671740 can be evenly divided by 1 2 4 5 10 20 33,587 67,174 134,348 167,935 335,870 and 671,740, with no remainder.
Since 671,740 cannot be divided by just 1 and 671,740, it is not a prime number.