Q: Is 1,240,605 a Prime Number?
A: No, 1,240,605 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 1240605 can be evenly divided by 1 3 5 9 15 19 45 57 95 171 285 855 1,451 4,353 7,255 13,059 21,765 27,569 65,295 82,707 137,845 248,121 413,535 and 1,240,605, with no remainder.
Since 1,240,605 cannot be divided by just 1 and 1,240,605, it is not a prime number.