112109 has 4 divisors (see below), whose sum is σ = 113760. Its totient is φ = 110460.

The previous prime is 112103. The next prime is 112111. The reversal of 112109 is 901211.

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 112109 - 2¹² = 108013 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 112093 and 112102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112103) 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, 719 + ... + 860.

It is an arithmetic number, because the mean of its divisors is an integer number (28440).

2¹¹²¹⁰⁹ is an apocalyptic number.

It is an amenable number.

112109 is a deficient number, since it is larger than the sum of its proper divisors (1651).

112109 is an equidigital number, since it uses as much as digits as its factorization.

112109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 112109 is about 334.8268209090. The cubic root of 112109 is about 48.2184774460.

The spelling of 112109 in words is "one hundred twelve thousand, one hundred nine".