12405516 has 12 divisors (see below), whose sum is σ = 28946232. Its totient is φ = 4135168.

The previous prime is 12405469. The next prime is 12405521. The reversal of 12405516 is 61550421.

12405516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516885 + ... + 516908.

It is an arithmetic number, because the mean of its divisors is an integer number (2412186).

Almost surely, 2^12405516 is an apocalyptic number.

It is an amenable number.

12405516 is an abundant number, since it is smaller than the sum of its proper divisors (16540716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12405516 is a wasteful number, since it uses less digits than its factorization.

12405516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033800 (or 1033798 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 12405516 is about 3522.1465046190. The cubic root of 12405516 is about 231.4932209917.

Adding to 12405516 its reverse (61550421), we get a palindrome (73955937).

It can be divided in two parts, 12405 and 516, that added together give a palindrome (12921).

The spelling of 12405516 in words is "twelve million, four hundred five thousand, five hundred sixteen".