Q: Is 1,578,402 a Prime Number?
A: No, 1,578,402 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 1578402 can be evenly divided by 1 2 3 6 7 9 14 18 21 42 63 126 12,527 25,054 37,581 75,162 87,689 112,743 175,378 225,486 263,067 526,134 789,201 and 1,578,402, with no remainder.
Since 1,578,402 cannot be divided by just 1 and 1,578,402, it is not a prime number.