Q: Is 1,278,920 a Prime Number?
A: No, 1,278,920 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 1278920 can be evenly divided by 1 2 4 5 8 10 20 40 31,973 63,946 127,892 159,865 255,784 319,730 639,460 and 1,278,920, with no remainder.
Since 1,278,920 cannot be divided by just 1 and 1,278,920, it is not a prime number.