Is 2145 a deficient number and what is its deficiency?

Is 2145 a deficient number?

Here we will explain and calculate if 2145 is a deficient number and its deficiency if applicable.

2145 is a deficient number if the sum of its proper divisors is less than 2145.

The sum of its proper divisors is calculated as follows: 1 + 3 + 5 + 11 + 13 + 15 + 33 + 39 + 55 + 65 + 143 + 165 + 195 + 429 + 715 = 1887.

1887 is less than 2145. Therefore, 2145 is a deficient number.

The deficiency of 2145 is 2145 minus the sum of its proper divisors. Thus, the deficiency of 2145 is 2145 - 1887 = 258

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