117855 has 24 divisors (see below), whose sum is σ = 214032. Its totient is φ = 62208.

The previous prime is 117851. The next prime is 117877. The reversal of 117855 is 558711.

117855 is a nontrivial binomial coefficient, being equal to C(486, 2).

It is not a de Polignac number, because 117855 - 2² = 117851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117851) 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 23 ways as a sum of consecutive naturals, for example, 1167 + ... + 1263.

It is an arithmetic number, because the mean of its divisors is an integer number (8918).

2¹¹⁷⁸⁵⁵ is an apocalyptic number.

117855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

117855 is the 485-th triangular number and also the 243-rd hexagonal number.

117855 is a deficient number, since it is larger than the sum of its proper divisors (96177).

117855 is an frugal number, since it uses more digits than its factorization.

117855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 105 counting only the distinct ones).

The product of its digits is 1400, while the sum is 27.

The square root of 117855 is about 343.3001602097. The cubic root of 117855 is about 49.0285825189.

The spelling of 117855 in words is "one hundred seventeen thousand, eight hundred fifty-five".