Is 1155 a deficient number and what is its deficiency?

Is 1155 a deficient number?

Here we will explain and calculate if 1155 is a deficient number and its deficiency if applicable.

1155 is a deficient number if the sum of its proper divisors is less than 1155.

The sum of its proper divisors is calculated as follows: 1 + 3 + 5 + 7 + 11 + 15 + 21 + 33 + 35 + 55 + 77 + 105 + 165 + 231 + 385 = 1149.

1149 is less than 1155. Therefore, 1155 is a deficient number.

The deficiency of 1155 is 1155 minus the sum of its proper divisors. Thus, the deficiency of 1155 is 1155 - 1149 = 6

Deficient Calculator
You can enter another number here to check if it is a deficient number:

Is 1156 a deficient number?
Go here for the next number on our list. Is it deficient?