Q: Is 1,678,340 a Prime Number?
A: No, 1,678,340 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 1678340 can be evenly divided by 1 2 4 5 10 20 31 62 124 155 310 620 2,707 5,414 10,828 13,535 27,070 54,140 83,917 167,834 335,668 419,585 839,170 and 1,678,340, with no remainder.
Since 1,678,340 cannot be divided by just 1 and 1,678,340, it is not a prime number.