11607561 has 18 divisors (see below), whose sum is σ = 19504602. Its totient is φ = 6632640.

The previous prime is 11607559. The next prime is 11607587. The reversal of 11607561 is 16570611.

11607561 is a `hidden beast` number, since 1 + 1 + 607 + 56 + 1 = 666.

11607561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11431161 + 176400 = 3381^2 + 420^2 .

It is not a de Polignac number, because 11607561 - 2¹ = 11607559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11607061) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12720 + ... + 13601.

It is an arithmetic number, because the mean of its divisors is an integer number (1083589).

Almost surely, 2^11607561 is an apocalyptic number.

It is an amenable number.

11607561 is a deficient number, since it is larger than the sum of its proper divisors (7897041).

11607561 is a wasteful number, since it uses less digits than its factorization.

11607561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26341 (or 26331 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 11607561 is about 3406.9870853879. The cubic root of 11607561 is about 226.4194119982.

The spelling of 11607561 in words is "eleven million, six hundred seven thousand, five hundred sixty-one".