12315605 has 16 divisors (see below), whose sum is σ = 15193920. Its totient is φ = 9580032.

The previous prime is 12315581. The next prime is 12315613. The reversal of 12315605 is 50651321.

It is a cyclic number.

It is not a de Polignac number, because 12315605 - 2⁸ = 12315349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32306 + ... + 32684.

It is an arithmetic number, because the mean of its divisors is an integer number (949620).

Almost surely, 2^12315605 is an apocalyptic number.

It is an amenable number.

12315605 is a deficient number, since it is larger than the sum of its proper divisors (2878315).

12315605 is an equidigital number, since it uses as much as digits as its factorization.

12315605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 12315605 is about 3509.3596281943. The cubic root of 12315605 is about 230.9326027900.

Adding to 12315605 its reverse (50651321), we get a palindrome (62966926).

The spelling of 12315605 in words is "twelve million, three hundred fifteen thousand, six hundred five".