118585521 has 6 divisors (see below), whose sum is σ = 171290210. Its totient is φ = 79057008.

The previous prime is 118585513. The next prime is 118585541. The reversal of 118585521 is 125585811.

It can be written as a sum of positive squares in only one way, i.e., 109495296 + 9090225 = 10464^2 + 3015^2 .

It is not a de Polignac number, because 118585521 - 2³ = 118585513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (118585501) 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 5 ways as a sum of consecutive naturals, for example, 6588076 + ... + 6588093.

Almost surely, 2^118585521 is an apocalyptic number.

It is an amenable number.

118585521 is a deficient number, since it is larger than the sum of its proper divisors (52704689).

118585521 is a wasteful number, since it uses less digits than its factorization.

118585521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13176175 (or 13176172 counting only the distinct ones).

The product of its digits is 16000, while the sum is 36.

The square root of 118585521 is about 10889.6979296948. The cubic root of 118585521 is about 491.2967471005.

The spelling of 118585521 in words is "one hundred eighteen million, five hundred eighty-five thousand, five hundred twenty-one".