Q: Is 1,378,720 a Prime Number?
A: No, 1,378,720 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 1378720 can be evenly divided by 1 2 4 5 7 8 10 14 16 20 28 32 35 40 56 70 80 112 140 160 224 280 560 1,120 1,231 2,462 4,924 6,155 8,617 9,848 12,310 17,234 19,696 24,620 34,468 39,392 43,085 49,240 68,936 86,170 98,480 137,872 172,340 196,960 275,744 344,680 689,360 and 1,378,720, with no remainder.
Since 1,378,720 cannot be divided by just 1 and 1,378,720, it is not a prime number.