112345 has 4 divisors (see below), whose sum is σ = 134820. Its totient is φ = 89872.

The previous prime is 112339. The next prime is 112349. The reversal of 112345 is 543211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543211 = 227 ⋅2393.

It can be written as a sum of positive squares in 2 ways, for example, as 63504 + 48841 = 252^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 112345 - 2³ = 112337 is a prime.

It is a plaindrome in base 10 and base 15.

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112349) 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, 11230 + ... + 11239.

It is an arithmetic number, because the mean of its divisors is an integer number (33705).

2¹¹²³⁴⁵ is an apocalyptic number.

It is an amenable number.

112345 is a deficient number, since it is larger than the sum of its proper divisors (22475).

112345 is an equidigital number, since it uses as much as digits as its factorization.

112345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22474.

The product of its digits is 120, while the sum is 16.

The square root of 112345 is about 335.1790566250. The cubic root of 112345 is about 48.2522885435.

Subtracting from 112345 its product of digits (120), we obtain a square (112225 = 335²).

Adding to 112345 its reverse (543211), we get a palindrome (655556).

The spelling of 112345 in words is "one hundred twelve thousand, three hundred forty-five".