Q: Is 1,387,960 a Prime Number?
A: No, 1,387,960 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 1387960 can be evenly divided by 1 2 4 5 7 8 10 14 20 28 35 40 56 70 140 280 4,957 9,914 19,828 24,785 34,699 39,656 49,570 69,398 99,140 138,796 173,495 198,280 277,592 346,990 693,980 and 1,387,960, with no remainder.
Since 1,387,960 cannot be divided by just 1 and 1,387,960, it is not a prime number.