11538587 has 4 divisors (see below), whose sum is σ = 11561256. Its totient is φ = 11515920.

The previous prime is 11538557. The next prime is 11538601. The reversal of 11538587 is 78583511.

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

It is a cyclic number.

It is not a de Polignac number, because 11538587 - 2⁶ = 11538523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11538587.

It is not an unprimeable number, because it can be changed into a prime (11538557) 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, 10553 + ... + 11594.

It is an arithmetic number, because the mean of its divisors is an integer number (2890314).

Almost surely, 2^11538587 is an apocalyptic number.

11538587 is a deficient number, since it is larger than the sum of its proper divisors (22669).

11538587 is an equidigital number, since it uses as much as digits as its factorization.

11538587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22668.

The product of its digits is 33600, while the sum is 38.

The square root of 11538587 is about 3396.8495698220. The cubic root of 11538587 is about 225.9700471960.

The spelling of 11538587 in words is "eleven million, five hundred thirty-eight thousand, five hundred eighty-seven".