112391 has 4 divisors (see below), whose sum is σ = 113232. Its totient is φ = 111552.

The previous prime is 112363. The next prime is 112397. The reversal of 112391 is 193211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 193211 = 19 ⋅10169.

It is a cyclic number.

It is not a de Polignac number, because 112391 - 2⁶ = 112327 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112397) 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, 170 + ... + 503.

It is an arithmetic number, because the mean of its divisors is an integer number (28308).

2¹¹²³⁹¹ is an apocalyptic number.

112391 is a deficient number, since it is larger than the sum of its proper divisors (841).

112391 is an equidigital number, since it uses as much as digits as its factorization.

112391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840.

The product of its digits is 54, while the sum is 17.

The square root of 112391 is about 335.2476696414. The cubic root of 112391 is about 48.2588733267.

The spelling of 112391 in words is "one hundred twelve thousand, three hundred ninety-one".