Is 1921 a deficient number and what is its deficiency?

Is 1921 a deficient number?

Here we will explain and calculate if 1921 is a deficient number and its deficiency if applicable.

1921 is a deficient number if the sum of its proper divisors is less than 1921.

The sum of its proper divisors is calculated as follows: 1 + 17 + 113 = 131.

131 is less than 1921. Therefore, 1921 is a deficient number.

The deficiency of 1921 is 1921 minus the sum of its proper divisors. Thus, the deficiency of 1921 is 1921 - 131 = 1790

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