Q: Is 840,123 a Prime Number?
A: No, 840,123 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 840123 can be evenly divided by 1 3 9 17 19 51 57 153 171 289 323 867 969 2,601 2,907 4,913 5,491 14,739 16,473 44,217 49,419 93,347 280,041 and 840,123, with no remainder.
Since 840,123 cannot be divided by just 1 and 840,123, it is not a prime number.