Q: Is 387,855 a Prime Number?
A: No, 387,855 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 387855 can be evenly divided by 1 3 5 9 13 15 17 27 39 45 51 65 85 117 135 153 169 195 221 255 351 459 507 585 663 765 845 1,105 1,521 1,755 1,989 2,295 2,535 2,873 3,315 4,563 5,967 7,605 8,619 9,945 14,365 22,815 25,857 29,835 43,095 77,571 129,285 and 387,855, with no remainder.
Since 387,855 cannot be divided by just 1 and 387,855, it is not a prime number.