Q: Is 1,428,340 a Prime Number?
A: No, 1,428,340 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 1428340 can be evenly divided by 1 2 4 5 10 17 20 34 68 85 170 340 4,201 8,402 16,804 21,005 42,010 71,417 84,020 142,834 285,668 357,085 714,170 and 1,428,340, with no remainder.
Since 1,428,340 cannot be divided by just 1 and 1,428,340, it is not a prime number.