Q: Is 1,397,320 a Prime Number?
A: No, 1,397,320 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 1397320 can be evenly divided by 1 2 4 5 8 10 20 40 181 193 362 386 724 772 905 965 1,448 1,544 1,810 1,930 3,620 3,860 7,240 7,720 34,933 69,866 139,732 174,665 279,464 349,330 698,660 and 1,397,320, with no remainder.
Since 1,397,320 cannot be divided by just 1 and 1,397,320, it is not a prime number.