Q: Is 1,243,665 a Prime Number?
A: No, 1,243,665 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 1243665 can be evenly divided by 1 3 5 9 15 29 45 87 145 261 435 953 1,305 2,859 4,765 8,577 14,295 27,637 42,885 82,911 138,185 248,733 414,555 and 1,243,665, with no remainder.
Since 1,243,665 cannot be divided by just 1 and 1,243,665, it is not a prime number.