Q: Is 787,215 a Prime Number?
A: No, 787,215 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 787215 can be evenly divided by 1 3 5 11 13 15 33 39 55 65 143 165 195 367 429 715 1,101 1,835 2,145 4,037 4,771 5,505 12,111 14,313 20,185 23,855 52,481 60,555 71,565 157,443 262,405 and 787,215, with no remainder.
Since 787,215 cannot be divided by just 1 and 787,215, it is not a prime number.