12 is a composite number - one of 14 such numbers - between 1 and 25.
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4,6,8,10,12,14,15,16,18,20,21,22,24
25 is not a prime number. It is composite.
The number 25 is a composite number. The factors of 25 other than 1 and itself are prime numbers (5 X 5).
A composite number is a number that has at least 3 factors. (It can be evenly divided by at least 3 number.) 25 has 3 factors: 1, 5, and 25.
3425 is a composite number having the factors 1, 5, 25, 137, 685, and 3425.