12660615 has 24 divisors (see below), whose sum is σ = 23941008. Its totient is φ = 6138240.

The previous prime is 12660589. The next prime is 12660629. The reversal of 12660615 is 51606621.

It is a happy number.

12660615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12660615 - 2⁶ = 12660551 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12294 + ... + 13283.

It is an arithmetic number, because the mean of its divisors is an integer number (997542).

Almost surely, 2^12660615 is an apocalyptic number.

12660615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12660615 is a deficient number, since it is larger than the sum of its proper divisors (11280393).

12660615 is a wasteful number, since it uses less digits than its factorization.

12660615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25599 (or 25596 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 12660615 is about 3558.1757966688. The cubic root of 12660615 is about 233.0692261163.

It can be divided in two parts, 126606 and 15, that added together give a palindrome (126621).

The spelling of 12660615 in words is "twelve million, six hundred sixty thousand, six hundred fifteen".