11526561 has 12 divisors (see below), whose sum is σ = 17629092. Its totient is φ = 7232256.

The previous prime is 11526553. The next prime is 11526563. The reversal of 11526561 is 16562511.

It is a happy number.

11526561 is a `hidden beast` number, since 1 + 1 + 5 + 2 + 656 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7700625 + 3825936 = 2775^2 + 1956^2 .

It is not a de Polignac number, because 11526561 - 2³ = 11526553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11526563) 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 11 ways as a sum of consecutive naturals, for example, 37516 + ... + 37821.

It is an arithmetic number, because the mean of its divisors is an integer number (1469091).

Almost surely, 2^11526561 is an apocalyptic number.

It is an amenable number.

11526561 is a deficient number, since it is larger than the sum of its proper divisors (6102531).

11526561 is a wasteful number, since it uses less digits than its factorization.

11526561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75360 (or 75357 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 11526561 is about 3395.0789386994. The cubic root of 11526561 is about 225.8915147484.

The spelling of 11526561 in words is "eleven million, five hundred twenty-six thousand, five hundred sixty-one".