11528661 has 4 divisors (see below), whose sum is σ = 15371552. Its totient is φ = 7685772.

The previous prime is 11528653. The next prime is 11528701. The reversal of 11528661 is 16682511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11528661 - 2³ = 11528653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11528651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1921441 + ... + 1921446.

It is an arithmetic number, because the mean of its divisors is an integer number (3842888).

Almost surely, 2^11528661 is an apocalyptic number.

It is an amenable number.

11528661 is a deficient number, since it is larger than the sum of its proper divisors (3842891).

11528661 is an equidigital number, since it uses as much as digits as its factorization.

11528661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3842890.

The product of its digits is 2880, while the sum is 30.

The square root of 11528661 is about 3395.3881957738. The cubic root of 11528661 is about 225.9052321493.

The spelling of 11528661 in words is "eleven million, five hundred twenty-eight thousand, six hundred sixty-one".