12113555 has 4 divisors (see below), whose sum is σ = 14536272. Its totient is φ = 9690840.

The previous prime is 12113539. The next prime is 12113557. The reversal of 12113555 is 55531121.

It is a happy number.

12113555 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12113555 - 2⁴ = 12113539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12113555.

It is not an unprimeable number, because it can be changed into a prime (12113557) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1211351 + ... + 1211360.

It is an arithmetic number, because the mean of its divisors is an integer number (3634068).

Almost surely, 2^12113555 is an apocalyptic number.

12113555 is a deficient number, since it is larger than the sum of its proper divisors (2422717).

12113555 is an equidigital number, since it uses as much as digits as its factorization.

12113555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422716.

The product of its digits is 750, while the sum is 23.

The square root of 12113555 is about 3480.4532750778. The cubic root of 12113555 is about 229.6627382102.

Adding to 12113555 its reverse (55531121), we get a palindrome (67644676).

The spelling of 12113555 in words is "twelve million, one hundred thirteen thousand, five hundred fifty-five".