117885 has 16 divisors (see below), whose sum is σ = 195840. Its totient is φ = 60480.

The previous prime is 117883. The next prime is 117889. The reversal of 117885 is 588711.

It is not a de Polignac number, because 117885 - 2¹ = 117883 is a prime.

It is an Ulam number.

117885 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300 + ... + 570.

It is an arithmetic number, because the mean of its divisors is an integer number (12240).

2¹¹⁷⁸⁸⁵ is an apocalyptic number.

117885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117885 is a deficient number, since it is larger than the sum of its proper divisors (77955).

117885 is a wasteful number, since it uses less digits than its factorization.

117885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308.

The product of its digits is 2240, while the sum is 30.

The square root of 117885 is about 343.3438509716. The cubic root of 117885 is about 49.0327422425.

Subtracting from 117885 its sum of digits (30), we obtain a triangular number (117855 = T₄₈₅).

The spelling of 117885 in words is "one hundred seventeen thousand, eight hundred eighty-five".