What do the number 12 25 and 36 have in common?

The numbers 12, 25, and 36 are all composite numbers, meaning they have divisors other than 1 and themselves. Additionally, they can each be expressed as the product of two integers: 12 (3 × 4), 25 (5 × 5), and 36 (6 × 6). Furthermore, all three numbers are part of the set of positive integers.