11187871 has 4 divisors (see below), whose sum is σ = 11298744. Its totient is φ = 11077000.

The previous prime is 11187859. The next prime is 11187877. The reversal of 11187871 is 17878111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17878111 = 101 ⋅177011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11187871 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 (11187877) 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, 55285 + ... + 55486.

It is an arithmetic number, because the mean of its divisors is an integer number (2824686).

Almost surely, 2^11187871 is an apocalyptic number.

11187871 is a deficient number, since it is larger than the sum of its proper divisors (110873).

11187871 is a wasteful number, since it uses less digits than its factorization.

11187871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110872.

The product of its digits is 3136, while the sum is 34.

The square root of 11187871 is about 3344.8274992890. The cubic root of 11187871 is about 223.6569938976.

The spelling of 11187871 in words is "eleven million, one hundred eighty-seven thousand, eight hundred seventy-one".