Q: Is 3,747,321 a Prime Number?
A: No, 3,747,321 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 3747321 can be evenly divided by 1 3 9 23 43 69 129 207 387 421 989 1,263 2,967 3,789 8,901 9,683 18,103 29,049 54,309 87,147 162,927 416,369 1,249,107 and 3,747,321, with no remainder.
Since 3,747,321 cannot be divided by just 1 and 3,747,321, it is not a prime number.