12671857 has 4 divisors (see below), whose sum is σ = 13823856. Its totient is φ = 11519860.

The previous prime is 12671849. The next prime is 12671861. The reversal of 12671857 is 75817621.

12671857 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12671857 - 2³ = 12671849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12671887) 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, 575983 + ... + 576004.

It is an arithmetic number, because the mean of its divisors is an integer number (3455964).

Almost surely, 2^12671857 is an apocalyptic number.

It is an amenable number.

12671857 is a deficient number, since it is larger than the sum of its proper divisors (1151999).

12671857 is a wasteful number, since it uses less digits than its factorization.

12671857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151998.

The product of its digits is 23520, while the sum is 37.

The square root of 12671857 is about 3559.7551882117. The cubic root of 12671857 is about 233.1381903569.

The spelling of 12671857 in words is "twelve million, six hundred seventy-one thousand, eight hundred fifty-seven".