Q: Is 421,689 a Prime Number?
A: No, 421,689 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 421689 can be evenly divided by 1 3 29 37 87 111 131 393 1,073 3,219 3,799 4,847 11,397 14,541 140,563 and 421,689, with no remainder.
Since 421,689 cannot be divided by just 1 and 421,689, it is not a prime number.