Q: Is 513,921 a Prime Number?
A: No, 513,921 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 513921 can be evenly divided by 1 3 107 321 1,601 4,803 171,307 and 513,921, with no remainder.
Since 513,921 cannot be divided by just 1 and 513,921, it is not a prime number.