Is 2065 a prime number or a composite number?

Answer 1

A Prime number is a number with two and only two factors: 1 (also known as unity) and itself. A composite number is a number with more than two factors; in other words, it has at least one factor besides 1 and itself.

2065 has factors other than 1 and itself, so it is not a prime number. For example, it is divisible by 5. (You can check this by looking at the last digit of the number. Any number ending in 0 or 5 is evenly divisible by 5, so it also has 5 as a factor.) Therefore, 2065 is a composite number.