Q: Is 1,231,587 a Prime Number?
A: No, 1,231,587 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 1231587 can be evenly divided by 1 3 7 9 21 63 113 173 339 519 791 1,017 1,211 1,557 2,373 3,633 7,119 10,899 19,549 58,647 136,843 175,941 410,529 and 1,231,587, with no remainder.
Since 1,231,587 cannot be divided by just 1 and 1,231,587, it is not a prime number.