Q: Is 21,045 a Prime Number?
A: No, 21,045 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 21045 can be evenly divided by 1 3 5 15 23 61 69 115 183 305 345 915 1,403 4,209 7,015 and 21,045, with no remainder.
Since 21,045 cannot be divided by just 1 and 21,045, it is not a prime number.