Is 4 a deficient number and what is its deficiency?

Is 4 a deficient number?

Here we will explain and calculate if 4 is a deficient number and its deficiency if applicable.

4 is a deficient number if the sum of its proper divisors is less than 4.

The sum of its proper divisors is calculated as follows: 1 + 2 = 3.

3 is less than 4. Therefore, 4 is a deficient number.

The deficiency of 4 is 4 minus the sum of its proper divisors. Thus, the deficiency of 4 is 4 - 3 = 1

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