11085561 has 24 divisors (see below), whose sum is σ = 16623360. Its totient is φ = 7114176.

The previous prime is 11085551. The next prime is 11085577. The reversal of 11085561 is 16558011.

11085561 is a `hidden beast` number, since 1 + 108 + 556 + 1 = 666.

It is not a de Polignac number, because 11085561 - 2⁷ = 11085433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11085541) 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 23 ways as a sum of consecutive naturals, for example, 30700 + ... + 31058.

It is an arithmetic number, because the mean of its divisors is an integer number (692640).

Almost surely, 2^11085561 is an apocalyptic number.

It is an amenable number.

11085561 is a deficient number, since it is larger than the sum of its proper divisors (5537799).

11085561 is a wasteful number, since it uses less digits than its factorization.

11085561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 11085561 is about 3329.4986109022. The cubic root of 11085561 is about 222.9731445604.

The spelling of 11085561 in words is "eleven million, eighty-five thousand, five hundred sixty-one".