Is 521 a deficient number and what is its deficiency?

Is 521 a deficient number?

Here we will explain and calculate if 521 is a deficient number and its deficiency if applicable.

521 is a deficient number if the sum of its proper divisors is less than 521.

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

1 is less than 521. Therefore, 521 is a deficient number.

The deficiency of 521 is 521 minus the sum of its proper divisors. Thus, the deficiency of 521 is 521 - 1 = 520

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