12785911 has 4 divisors (see below), whose sum is σ = 12859992. Its totient is φ = 12711832.

The previous prime is 12785869. The next prime is 12785933. The reversal of 12785911 is 11958721.

It is a happy number.

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 12785911 - 2¹¹ = 12783863 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 (12785951) 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 3 ways as a sum of consecutive naturals, for example, 36781 + ... + 37126.

It is an arithmetic number, because the mean of its divisors is an integer number (3214998).

Almost surely, 2^12785911 is an apocalyptic number.

12785911 is a deficient number, since it is larger than the sum of its proper divisors (74081).

12785911 is an equidigital number, since it uses as much as digits as its factorization.

12785911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74080.

The product of its digits is 5040, while the sum is 34.

The square root of 12785911 is about 3575.7392242724. The cubic root of 12785911 is about 233.8355615358.

The spelling of 12785911 in words is "twelve million, seven hundred eighty-five thousand, nine hundred eleven".