13239871 has 4 divisors (see below), whose sum is σ = 13357152. Its totient is φ = 13122592.

The previous prime is 13239857. The next prime is 13239887. The reversal of 13239871 is 17893231.

13239871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13239871 - 2¹³ = 13231679 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 (13239671) 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, 58471 + ... + 58696.

It is an arithmetic number, because the mean of its divisors is an integer number (3339288).

Almost surely, 2^13239871 is an apocalyptic number.

13239871 is a deficient number, since it is larger than the sum of its proper divisors (117281).

13239871 is a wasteful number, since it uses less digits than its factorization.

13239871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117280.

The product of its digits is 9072, while the sum is 34.

The square root of 13239871 is about 3638.6633534857. The cubic root of 13239871 is about 236.5708613963.

The spelling of 13239871 in words is "thirteen million, two hundred thirty-nine thousand, eight hundred seventy-one".