Q: Is 1,606,521 a Prime Number?
A: No, 1,606,521 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 1606521 can be evenly divided by 1 3 7 21 113 339 677 791 2,031 2,373 4,739 14,217 76,501 229,503 535,507 and 1,606,521, with no remainder.
Since 1,606,521 cannot be divided by just 1 and 1,606,521, it is not a prime number.