Q: Is 842,643 a Prime Number?
A: No, 842,643 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 842643 can be evenly divided by 1 3 9 27 81 101 103 303 309 909 927 2,727 2,781 8,181 8,343 10,403 31,209 93,627 280,881 and 842,643, with no remainder.
Since 842,643 cannot be divided by just 1 and 842,643, it is not a prime number.