112809 has 8 divisors (see below), whose sum is σ = 155392. Its totient is φ = 72720.

The previous prime is 112807. The next prime is 112831. The reversal of 112809 is 908211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 112809 - 2¹ = 112807 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (112807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514 + ... + 699.

It is an arithmetic number, because the mean of its divisors is an integer number (19424).

2¹¹²⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

112809 is a deficient number, since it is larger than the sum of its proper divisors (42583).

112809 is a wasteful number, since it uses less digits than its factorization.

112809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 112809 is about 335.8705107627. The cubic root of 112809 is about 48.3186267847.

The spelling of 112809 in words is "one hundred twelve thousand, eight hundred nine".