Q: Is 21,479 a Prime Number?
A: No, 21,479 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 21479 can be evenly divided by 1 47 457 and 21,479, with no remainder.
Since 21,479 cannot be divided by just 1 and 21,479, it is not a prime number.