Q: Is 621,429 a Prime Number?
A: No, 621,429 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 621429 can be evenly divided by 1 3 359 577 1,077 1,731 207,143 and 621,429, with no remainder.
Since 621,429 cannot be divided by just 1 and 621,429, it is not a prime number.