Is 1215 a deficient number and what is its deficiency?

Is 1215 a deficient number?

Here we will explain and calculate if 1215 is a deficient number and its deficiency if applicable.

1215 is a deficient number if the sum of its proper divisors is less than 1215.

The sum of its proper divisors is calculated as follows: 1 + 3 + 5 + 9 + 15 + 27 + 45 + 81 + 135 + 243 + 405 = 969.

969 is less than 1215. Therefore, 1215 is a deficient number.

The deficiency of 1215 is 1215 minus the sum of its proper divisors. Thus, the deficiency of 1215 is 1215 - 969 = 246

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