12615445 has 16 divisors (see below), whose sum is σ = 16133040. Its totient is φ = 9437184.

The previous prime is 12615437. The next prime is 12615451. The reversal of 12615445 is 54451621.

12615445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 161604 + 12453841 = 402^2 + 3529^2 .

It is a 10-Lehmer number, since φ(12615445) divides (12615445-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 12615445 - 2³ = 12615437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16021 + ... + 16789.

It is an arithmetic number, because the mean of its divisors is an integer number (1008315).

Almost surely, 2^12615445 is an apocalyptic number.

It is an amenable number.

12615445 is a deficient number, since it is larger than the sum of its proper divisors (3517595).

12615445 is a wasteful number, since it uses less digits than its factorization.

12615445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its digits is 4800, while the sum is 28.

The square root of 12615445 is about 3551.8227714795. The cubic root of 12615445 is about 232.7917176921.

The spelling of 12615445 in words is "twelve million, six hundred fifteen thousand, four hundred forty-five".