Q: Is 865,120 a Prime Number?
A: No, 865,120 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 865120 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 80 160 5,407 10,814 21,628 27,035 43,256 54,070 86,512 108,140 173,024 216,280 432,560 and 865,120, with no remainder.
Since 865,120 cannot be divided by just 1 and 865,120, it is not a prime number.