11239871 has 4 divisors (see below), whose sum is σ = 11246592. Its totient is φ = 11233152.

The previous prime is 11239867. The next prime is 11239903. The reversal of 11239871 is 17893211.

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.

It is a cyclic number.

It is not a de Polignac number, because 11239871 - 2² = 11239867 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 (11239841) 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, 1346 + ... + 4928.

It is an arithmetic number, because the mean of its divisors is an integer number (2811648).

Almost surely, 2^11239871 is an apocalyptic number.

11239871 is a deficient number, since it is larger than the sum of its proper divisors (6721).

11239871 is an equidigital number, since it uses as much as digits as its factorization.

11239871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720.

The product of its digits is 3024, while the sum is 32.

The square root of 11239871 is about 3352.5916840558. The cubic root of 11239871 is about 224.0029695078.

The spelling of 11239871 in words is "eleven million, two hundred thirty-nine thousand, eight hundred seventy-one".