112891 has 4 divisors (see below), whose sum is σ = 114400. Its totient is φ = 111384.

The previous prime is 112877. The next prime is 112901. The reversal of 112891 is 198211.

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 112891 - 2⁵ = 112859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112831) 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, 636 + ... + 793.

It is an arithmetic number, because the mean of its divisors is an integer number (28600).

2¹¹²⁸⁹¹ is an apocalyptic number.

112891 is the 213-rd centered pentagonal number.

112891 is a deficient number, since it is larger than the sum of its proper divisors (1509).

112891 is an equidigital number, since it uses as much as digits as its factorization.

112891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508.

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

The square root of 112891 is about 335.9925594414. The cubic root of 112891 is about 48.3303314294.

The spelling of 112891 in words is "one hundred twelve thousand, eight hundred ninety-one".