Is 1621 a deficient number and what is its deficiency?

Is 1621 a deficient number?

Here we will explain and calculate if 1621 is a deficient number and its deficiency if applicable.

1621 is a deficient number if the sum of its proper divisors is less than 1621.

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

1 is less than 1621. Therefore, 1621 is a deficient number.

The deficiency of 1621 is 1621 minus the sum of its proper divisors. Thus, the deficiency of 1621 is 1621 - 1 = 1620

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