11187665 has 8 divisors (see below), whose sum is σ = 13516200. Its totient is φ = 8889472.

The previous prime is 11187643. The next prime is 11187667. The reversal of 11187665 is 56678111.

11187665 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 4 ways, for example, as 5329 + 11182336 = 73^2 + 3344^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11187665 - 2¹⁰ = 11186641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11187667) 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 7 ways as a sum of consecutive naturals, for example, 6764 + ... + 8253.

It is an arithmetic number, because the mean of its divisors is an integer number (1689525).

Almost surely, 2^11187665 is an apocalyptic number.

It is an amenable number.

11187665 is a deficient number, since it is larger than the sum of its proper divisors (2328535).

11187665 is a wasteful number, since it uses less digits than its factorization.

11187665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15171.

The product of its digits is 10080, while the sum is 35.

The square root of 11187665 is about 3344.7967053320. The cubic root of 11187665 is about 223.6556211722.

The spelling of 11187665 in words is "eleven million, one hundred eighty-seven thousand, six hundred sixty-five".