11505887 has 4 divisors (see below), whose sum is σ = 12111480. Its totient is φ = 10900296.

The previous prime is 11505883. The next prime is 11505913. The reversal of 11505887 is 78850511.

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 11505887 - 2² = 11505883 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 (11505883) 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, 302768 + ... + 302805.

It is an arithmetic number, because the mean of its divisors is an integer number (3027870).

Almost surely, 2^11505887 is an apocalyptic number.

11505887 is a deficient number, since it is larger than the sum of its proper divisors (605593).

11505887 is an equidigital number, since it uses as much as digits as its factorization.

11505887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605592.

The product of its (nonzero) digits is 11200, while the sum is 35.

The square root of 11505887 is about 3392.0328713030. The cubic root of 11505887 is about 225.7563811775.

The spelling of 11505887 in words is "eleven million, five hundred five thousand, eight hundred eighty-seven".