12805931 has 8 divisors (see below), whose sum is σ = 12994800. Its totient is φ = 12618720.

The previous prime is 12805921. The next prime is 12805937. The reversal of 12805931 is 13950821.

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

It is a cyclic number.

It is not a de Polignac number, because 12805931 - 2¹⁰ = 12804907 is a prime.

It is a super-2 number, since 2×12805931² = 327983737553522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12805894 and 12805903.

It is not an unprimeable number, because it can be changed into a prime (12805937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24905 + ... + 25413.

It is an arithmetic number, because the mean of its divisors is an integer number (1624350).

Almost surely, 2^12805931 is an apocalyptic number.

12805931 is a deficient number, since it is larger than the sum of its proper divisors (188869).

12805931 is a wasteful number, since it uses less digits than its factorization.

12805931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 12805931 is about 3578.5375504527. The cubic root of 12805931 is about 233.9575433723.

The spelling of 12805931 in words is "twelve million, eight hundred five thousand, nine hundred thirty-one".