Q: Is 4,263,921 a Prime Number?
A: No, 4,263,921 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 4263921 can be evenly divided by 1 3 9 27 81 243 729 5,849 17,547 52,641 157,923 473,769 1,421,307 and 4,263,921, with no remainder.
Since 4,263,921 cannot be divided by just 1 and 4,263,921, it is not a prime number.