Is 1265 a deficient number and what is its deficiency?

Is 1265 a deficient number?

Here we will explain and calculate if 1265 is a deficient number and its deficiency if applicable.

1265 is a deficient number if the sum of its proper divisors is less than 1265.

The sum of its proper divisors is calculated as follows: 1 + 5 + 11 + 23 + 55 + 115 + 253 = 463.

463 is less than 1265. Therefore, 1265 is a deficient number.

The deficiency of 1265 is 1265 minus the sum of its proper divisors. Thus, the deficiency of 1265 is 1265 - 463 = 802

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