112531 has 4 divisors (see below), whose sum is σ = 115192. Its totient is φ = 109872.

The previous prime is 112507. The next prime is 112543. The reversal of 112531 is 135211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 112531 - 2⁷ = 112403 is a prime.

It is a super-2 number, since 2×112531² = 25326451922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112501) 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 3 ways as a sum of consecutive naturals, for example, 1266 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (28798).

2¹¹²⁵³¹ is an apocalyptic number.

112531 is a deficient number, since it is larger than the sum of its proper divisors (2661).

112531 is an equidigital number, since it uses as much as digits as its factorization.

112531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660.

The product of its digits is 30, while the sum is 13.

The square root of 112531 is about 335.4564055134. The cubic root of 112531 is about 48.2789029225.

Adding to 112531 its reverse (135211), we get a palindrome (247742).

It can be divided in two parts, 1125 and 31, that added together give a square (1156 = 34²).

The spelling of 112531 in words is "one hundred twelve thousand, five hundred thirty-one".