115812 has 18 divisors (see below), whose sum is σ = 292838. Its totient is φ = 38592.

The previous prime is 115811. The next prime is 115823. The reversal of 115812 is 218511.

It can be written as a sum of positive squares in only one way, i.e., 112896 + 2916 = 336^2 + 54^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (115811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1573 + ... + 1644.

2¹¹⁵⁸¹² is an apocalyptic number.

115812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

115812 is an abundant number, since it is smaller than the sum of its proper divisors (177026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115812 is a wasteful number, since it uses less digits than its factorization.

115812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227 (or 3222 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 115812 is about 340.3116218997. The cubic root of 115812 is about 48.7436283586.

The spelling of 115812 in words is "one hundred fifteen thousand, eight hundred twelve".