12896815 has 4 divisors (see below), whose sum is σ = 15476184. Its totient is φ = 10317448.

The previous prime is 12896809. The next prime is 12896827. The reversal of 12896815 is 51869821.

12896815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12896815 - 2¹⁹ = 12372527 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1289677 + ... + 1289686.

It is an arithmetic number, because the mean of its divisors is an integer number (3869046).

Almost surely, 2^12896815 is an apocalyptic number.

12896815 is a deficient number, since it is larger than the sum of its proper divisors (2579369).

12896815 is an equidigital number, since it uses as much as digits as its factorization.

12896815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579368.

The product of its digits is 34560, while the sum is 40.

The square root of 12896815 is about 3591.2135831777. The cubic root of 12896815 is about 234.5097066220.

The spelling of 12896815 in words is "twelve million, eight hundred ninety-six thousand, eight hundred fifteen".