Q: Is 1,604,681 a Prime Number?
A: No, 1,604,681 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 1604681 can be evenly divided by 1 13 17 53 137 221 689 901 1,781 2,329 7,261 11,713 30,277 94,393 123,437 and 1,604,681, with no remainder.
Since 1,604,681 cannot be divided by just 1 and 1,604,681, it is not a prime number.