Q: Is 1,321,328 a Prime Number?
A: No, 1,321,328 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 1321328 can be evenly divided by 1 2 4 8 16 269 307 538 614 1,076 1,228 2,152 2,456 4,304 4,912 82,583 165,166 330,332 660,664 and 1,321,328, with no remainder.
Since 1,321,328 cannot be divided by just 1 and 1,321,328, it is not a prime number.