Q: Is 1,375,398 a Prime Number?
A: No, 1,375,398 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 1375398 can be evenly divided by 1 2 3 6 9 18 43 86 129 258 387 774 1,777 3,554 5,331 10,662 15,993 31,986 76,411 152,822 229,233 458,466 687,699 and 1,375,398, with no remainder.
Since 1,375,398 cannot be divided by just 1 and 1,375,398, it is not a prime number.