12855812 has 12 divisors (see below), whose sum is σ = 22538460. Its totient is φ = 6416256.

The previous prime is 12855809. The next prime is 12855823. The reversal of 12855812 is 21855821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6635776 + 6220036 = 2576^2 + 2494^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137 + ... + 5072.

It is an arithmetic number, because the mean of its divisors is an integer number (1878205).

Almost surely, 2^12855812 is an apocalyptic number.

It is an amenable number.

12855812 is a deficient number, since it is larger than the sum of its proper divisors (9682648).

12855812 is a wasteful number, since it uses less digits than its factorization.

12855812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830 (or 5828 counting only the distinct ones).

The product of its digits is 6400, while the sum is 32.

The square root of 12855812 is about 3585.5002440385. The cubic root of 12855812 is about 234.2609162587.

Subtracting 12855812 from its reverse (21855821), we obtain a palindrome (9000009).

The spelling of 12855812 in words is "twelve million, eight hundred fifty-five thousand, eight hundred twelve".