Q: Is 1,240,578 a Prime Number?
A: No, 1,240,578 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 1240578 can be evenly divided by 1 2 3 6 9 18 41 82 123 246 369 738 1,681 3,362 5,043 10,086 15,129 30,258 68,921 137,842 206,763 413,526 620,289 and 1,240,578, with no remainder.
Since 1,240,578 cannot be divided by just 1 and 1,240,578, it is not a prime number.