12591871 has 8 divisors (see below), whose sum is σ = 12785360. Its totient is φ = 12400128.

The previous prime is 12591857. The next prime is 12591893. The reversal of 12591871 is 17819521.

It is a happy number.

12591871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12591871 - 2⁷ = 12591743 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 (12591811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21535 + ... + 22111.

It is an arithmetic number, because the mean of its divisors is an integer number (1598170).

Almost surely, 2^12591871 is an apocalyptic number.

12591871 is a deficient number, since it is larger than the sum of its proper divisors (193489).

12591871 is a wasteful number, since it uses less digits than its factorization.

12591871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873.

The product of its digits is 5040, while the sum is 34.

The square root of 12591871 is about 3548.5026419604. The cubic root of 12591871 is about 232.6466242819.

The spelling of 12591871 in words is "twelve million, five hundred ninety-one thousand, eight hundred seventy-one".