12615505 has 16 divisors (see below), whose sum is σ = 17671680. Its totient is φ = 8465472.

The previous prime is 12615503. The next prime is 12615509. The reversal of 12615505 is 50551621.

12615505 is digitally balanced in base 2, 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 12615505 - 2¹ = 12615503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12615505.

It is not an unprimeable number, because it can be changed into a prime (12615503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2190 + ... + 5479.

It is an arithmetic number, because the mean of its divisors is an integer number (1104480).

Almost surely, 2^12615505 is an apocalyptic number.

It is an amenable number.

12615505 is a deficient number, since it is larger than the sum of its proper divisors (5056175).

12615505 is an equidigital number, since it uses as much as digits as its factorization.

12615505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7728.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 12615505 is about 3551.8312178368. The cubic root of 12615505 is about 232.7920867498.

The spelling of 12615505 in words is "twelve million, six hundred fifteen thousand, five hundred five".