Q: Is 4,321,665 a Prime Number?
A: No, 4,321,665 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 4321665 can be evenly divided by 1 3 5 9 15 45 137 411 685 701 1,233 2,055 2,103 3,505 6,165 6,309 10,515 31,545 96,037 288,111 480,185 864,333 1,440,555 and 4,321,665, with no remainder.
Since 4,321,665 cannot be divided by just 1 and 4,321,665, it is not a prime number.