Number: 12

Properties:

• Natural number: Whole number greater than 0
• Even number: Divisible by 2 without a remainder
• Composite number: Has factors other than 1 and itself (2, 3, 4, 6)
• Abundant number: The sum of its proper divisors (1, 2, 3, 4, 6) is greater than the number itself
• Deficient number: The sum of its proper divisors (1, 2) is less than the number itself

Mathematical facts:

• Square of 3: 12 = 3²
• Product of 2 and 6: 12 = 2 × 6
• Number of months in a year
• Number of hours on an analog clock face
• Number of signs of the Zodiac
• Number of jurors in a standard jury trial
• Atomic number of magnesium