12986785 has 32 divisors (see below), whose sum is σ = 19123200. Its totient is φ = 8268480.

The previous prime is 12986783. The next prime is 12986797. The reversal of 12986785 is 58768921.

12986785 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12986785 - 2¹ = 12986783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12986783) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39070 + ... + 39400.

It is an arithmetic number, because the mean of its divisors is an integer number (597600).

Almost surely, 2^12986785 is an apocalyptic number.

It is an amenable number.

12986785 is a deficient number, since it is larger than the sum of its proper divisors (6136415).

12986785 is a wasteful number, since it uses less digits than its factorization.

12986785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421.

The product of its digits is 241920, while the sum is 46.

The square root of 12986785 is about 3603.7182187291. The cubic root of 12986785 is about 235.0537676880.

The spelling of 12986785 in words is "twelve million, nine hundred eighty-six thousand, seven hundred eighty-five".