Is 421 a deficient number and what is its deficiency?

Is 421 a deficient number?

Here we will explain and calculate if 421 is a deficient number and its deficiency if applicable.

421 is a deficient number if the sum of its proper divisors is less than 421.

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

1 is less than 421. Therefore, 421 is a deficient number.

The deficiency of 421 is 421 minus the sum of its proper divisors. Thus, the deficiency of 421 is 421 - 1 = 420

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