Q: Is 643,122 a Prime Number?
A: No, 643,122 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 643122 can be evenly divided by 1 2 3 6 9 18 35,729 71,458 107,187 214,374 321,561 and 643,122, with no remainder.
Since 643,122 cannot be divided by just 1 and 643,122, it is not a prime number.