Is 2015 a deficient number and what is its deficiency?

Is 2015 a deficient number?

Here we will explain and calculate if 2015 is a deficient number and its deficiency if applicable.

2015 is a deficient number if the sum of its proper divisors is less than 2015.

The sum of its proper divisors is calculated as follows: 1 + 5 + 13 + 31 + 65 + 155 + 403 = 673.

673 is less than 2015. Therefore, 2015 is a deficient number.

The deficiency of 2015 is 2015 minus the sum of its proper divisors. Thus, the deficiency of 2015 is 2015 - 673 = 1342

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