11985897 has 48 divisors (see below), whose sum is σ = 20684160. Its totient is φ = 6040320.

The previous prime is 11985889. The next prime is 11985907. The reversal of 11985897 is 79858911.

It is not a de Polignac number, because 11985897 - 2³ = 11985889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11985847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134629 + ... + 134717.

It is an arithmetic number, because the mean of its divisors is an integer number (430920).

Almost surely, 2^11985897 is an apocalyptic number.

It is an amenable number.

11985897 is a deficient number, since it is larger than the sum of its proper divisors (8698263).

11985897 is a wasteful number, since it uses less digits than its factorization.

11985897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 163 counting only the distinct ones).

The product of its digits is 181440, while the sum is 48.

The square root of 11985897 is about 3462.0654239919. The cubic root of 11985897 is about 228.8531249914.

The spelling of 11985897 in words is "eleven million, nine hundred eighty-five thousand, eight hundred ninety-seven".