11113871 has 4 divisors (see below), whose sum is σ = 11122200. Its totient is φ = 11105544.

The previous prime is 11113849. The next prime is 11113891. The reversal of 11113871 is 17831111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17831111 = 43 ⋅414677.

It is a cyclic number.

It is not a de Polignac number, because 11113871 - 2¹⁰ = 11112847 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 (11113891) 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 3 ways as a sum of consecutive naturals, for example, 1661 + ... + 4998.

It is an arithmetic number, because the mean of its divisors is an integer number (2780550).

Almost surely, 2^11113871 is an apocalyptic number.

11113871 is a deficient number, since it is larger than the sum of its proper divisors (8329).

11113871 is an equidigital number, since it uses as much as digits as its factorization.

11113871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8328.

The product of its digits is 168, while the sum is 23.

The square root of 11113871 is about 3333.7472909625. The cubic root of 11113871 is about 223.1627907702.

Adding to 11113871 its reverse (17831111), we get a palindrome (28944982).

The spelling of 11113871 in words is "eleven million, one hundred thirteen thousand, eight hundred seventy-one".