12926821 has 8 divisors (see below), whose sum is σ = 13671200. Its totient is φ = 12188880.

The previous prime is 12926819. The next prime is 12926831. The reversal of 12926821 is 12862921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12926821 - 2¹ = 12926819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12926831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2866 + ... + 5836.

It is an arithmetic number, because the mean of its divisors is an integer number (1708900).

Almost surely, 2^12926821 is an apocalyptic number.

It is an amenable number.

12926821 is a deficient number, since it is larger than the sum of its proper divisors (744379).

12926821 is a wasteful number, since it uses less digits than its factorization.

12926821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219.

The product of its digits is 3456, while the sum is 31.

The square root of 12926821 is about 3595.3888524053. The cubic root of 12926821 is about 234.6914374875.

The spelling of 12926821 in words is "twelve million, nine hundred twenty-six thousand, eight hundred twenty-one".