11515887 has 12 divisors (see below), whose sum is σ = 16664440. Its totient is φ = 7663248.

The previous prime is 11515879. The next prime is 11515897. The reversal of 11515887 is 78851511.

It is a happy number.

It is not a de Polignac number, because 11515887 - 2³ = 11515879 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 (11515897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7164 + ... + 8622.

Almost surely, 2^11515887 is an apocalyptic number.

11515887 is a deficient number, since it is larger than the sum of its proper divisors (5148553).

11515887 is a wasteful number, since it uses less digits than its factorization.

11515887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342 (or 2339 counting only the distinct ones).

The product of its digits is 11200, while the sum is 36.

The square root of 11515887 is about 3393.5065934811. The cubic root of 11515887 is about 225.8217653904.

The spelling of 11515887 in words is "eleven million, five hundred fifteen thousand, eight hundred eighty-seven".