12815385 has 32 divisors (see below), whose sum is σ = 22619520. Its totient is φ = 6144000.

The previous prime is 12815353. The next prime is 12815417. The reversal of 12815385 is 58351821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12815353) and next prime (12815417).

It is not a de Polignac number, because 12815385 - 2⁵ = 12815353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16281 + ... + 17049.

It is an arithmetic number, because the mean of its divisors is an integer number (706860).

Almost surely, 2^12815385 is an apocalyptic number.

12815385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12815385 is a deficient number, since it is larger than the sum of its proper divisors (9804135).

12815385 is a wasteful number, since it uses less digits than its factorization.

12815385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889.

The product of its digits is 9600, while the sum is 33.

The square root of 12815385 is about 3579.8582374167. The cubic root of 12815385 is about 234.0151023929.

It can be divided in two parts, 1281 and 5385, that added together give a palindrome (6666).

The spelling of 12815385 in words is "twelve million, eight hundred fifteen thousand, three hundred eighty-five".