112981 has 4 divisors (see below), whose sum is σ = 123264. Its totient is φ = 102700.

The previous prime is 112979. The next prime is 112997. The reversal of 112981 is 189211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 112981 - 2¹ = 112979 is a prime.

It is a super-2 number, since 2×112981² = 25529412722, which contains 22 as substring.

It is a Duffinian number.

112981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5125 + ... + 5146.

It is an arithmetic number, because the mean of its divisors is an integer number (30816).

2¹¹²⁹⁸¹ is an apocalyptic number.

112981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

112981 is a deficient number, since it is larger than the sum of its proper divisors (10283).

112981 is a wasteful number, since it uses less digits than its factorization.

112981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10282.

The product of its digits is 144, while the sum is 22.

The square root of 112981 is about 336.1264642958. The cubic root of 112981 is about 48.3431714681.

It can be divided in two parts, 11 and 2981, that added together give a palindrome (2992).

The spelling of 112981 in words is "one hundred twelve thousand, nine hundred eighty-one".