12113605 has 16 divisors (see below), whose sum is σ = 17591040. Its totient is φ = 7817472.

The previous prime is 12113599. The next prime is 12113657. The reversal of 12113605 is 50631121.

12113605 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12113605 - 2³ = 12113597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9585 + ... + 10774.

It is an arithmetic number, because the mean of its divisors is an integer number (1099440).

Almost surely, 2^12113605 is an apocalyptic number.

It is an amenable number.

12113605 is a deficient number, since it is larger than the sum of its proper divisors (5477435).

12113605 is a wasteful number, since it uses less digits than its factorization.

12113605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20388.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 12113605 is about 3480.4604580429. The cubic root of 12113605 is about 229.6630541956.

Adding to 12113605 its reverse (50631121), we get a palindrome (62744726).

It can be divided in two parts, 121 and 13605, that multiplied together give a triangular number (1646205 = T₁₈₁₄).

The spelling of 12113605 in words is "twelve million, one hundred thirteen thousand, six hundred five".