Yes 405 is composite. Its factors are 1,5,81,and 405. There could be more but i don't know it! =)
It is a composite number because 405 is divisible by 5.
405 is a composite number because it has more than 2 factors
405 is a composite number. It is most visibly divisible by 5 as well as 1 and 405.
In exponents: 34*5 = 405
no its composite 1,5,81,and 405
405 is composite. Anything that is divisible by more than two numbers (itself and 1) is considered a composite number. Looking at the number, you can tell that it is divisible by 5 because it ends in a 5. There will be more factors, but finding one that is not 1 or itself will cause the number to be composite.
405 = 3 x 3 x 3 x 3 x 5
It is a composite number.
It is not a prime number, it is a composite number.
It is not a prime number, it is a composite number.
It is a composite number, not a prime number.
It is a prime number, and therefore not a composite number.251 is prime.