11511085 has 4 divisors (see below), whose sum is σ = 13813308. Its totient is φ = 9208864.

The previous prime is 11511079. The next prime is 11511089. The reversal of 11511085 is 58011511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2996361 + 8514724 = 1731^2 + 2918^2 .

It is a cyclic number.

It is not a de Polignac number, because 11511085 - 2¹¹ = 11509037 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11511089) 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, 1151104 + ... + 1151113.

It is an arithmetic number, because the mean of its divisors is an integer number (3453327).

Almost surely, 2^11511085 is an apocalyptic number.

It is an amenable number.

11511085 is a deficient number, since it is larger than the sum of its proper divisors (2302223).

11511085 is an equidigital number, since it uses as much as digits as its factorization.

11511085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302222.

The product of its (nonzero) digits is 200, while the sum is 22.

The square root of 11511085 is about 3392.7989919829. The cubic root of 11511085 is about 225.7903726174.

Adding to 11511085 its reverse (58011511), we get a palindrome (69522596).

The spelling of 11511085 in words is "eleven million, five hundred eleven thousand, eighty-five".