Is 1143 a deficient number and what is its deficiency?

Is 1143 a deficient number?

Here we will explain and calculate if 1143 is a deficient number and its deficiency if applicable.

1143 is a deficient number if the sum of its proper divisors is less than 1143.

The sum of its proper divisors is calculated as follows: 1 + 3 + 9 + 127 + 381 = 521.

521 is less than 1143. Therefore, 1143 is a deficient number.

The deficiency of 1143 is 1143 minus the sum of its proper divisors. Thus, the deficiency of 1143 is 1143 - 521 = 622

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