12857885 has 8 divisors (see below), whose sum is σ = 15682776. Its totient is φ = 10117440.

The previous prime is 12857881. The next prime is 12857891. The reversal of 12857885 is 58875821.

It can be written as a sum of positive squares in 4 ways, for example, as 276676 + 12581209 = 526^2 + 3547^2 .

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

It is not a de Polignac number, because 12857885 - 2² = 12857881 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 (12857881) 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, 20774 + ... + 21383.

It is an arithmetic number, because the mean of its divisors is an integer number (1960347).

Almost surely, 2^12857885 is an apocalyptic number.

It is an amenable number.

12857885 is a deficient number, since it is larger than the sum of its proper divisors (2824891).

12857885 is an equidigital number, since it uses as much as digits as its factorization.

12857885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42223.

The product of its digits is 179200, while the sum is 44.

The square root of 12857885 is about 3585.7893133869. The cubic root of 12857885 is about 234.2735071081.

The spelling of 12857885 in words is "twelve million, eight hundred fifty-seven thousand, eight hundred eighty-five".