12826815 has 16 divisors (see below), whose sum is σ = 20830848. Its totient is φ = 6738336.

The previous prime is 12826811. The next prime is 12826819. The reversal of 12826815 is 51862821.

It is an interprime number because it is at equal distance from previous prime (12826811) and next prime (12826819).

It is not a de Polignac number, because 12826815 - 2² = 12826811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12826811) 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, 5377 + ... + 7386.

It is an arithmetic number, because the mean of its divisors is an integer number (1301928).

Almost surely, 2^12826815 is an apocalyptic number.

12826815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12826815 is a deficient number, since it is larger than the sum of its proper divisors (8004033).

12826815 is a wasteful number, since it uses less digits than its factorization.

12826815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12838.

The product of its digits is 7680, while the sum is 33.

The square root of 12826815 is about 3581.4543135436. The cubic root of 12826815 is about 234.0846541544.

The spelling of 12826815 in words is "twelve million, eight hundred twenty-six thousand, eight hundred fifteen".