Q: Is 642,999 a Prime Number?
A: No, 642,999 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 642999 can be evenly divided by 1 3 7 21 67 201 457 469 1,371 1,407 3,199 9,597 30,619 91,857 214,333 and 642,999, with no remainder.
Since 642,999 cannot be divided by just 1 and 642,999, it is not a prime number.