12881857 has 4 divisors (see below), whose sum is σ = 12889540. Its totient is φ = 12874176.

The previous prime is 12881839. The next prime is 12881899. The reversal of 12881857 is 75818821.

12881857 is digitally balanced in base 3, 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75818821 = 13 ⋅5832217.

It can be written as a sum of positive squares in 2 ways, for example, as 11498881 + 1382976 = 3391^2 + 1176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12881857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12881657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132 + ... + 5077.

It is an arithmetic number, because the mean of its divisors is an integer number (3222385).

Almost surely, 2^12881857 is an apocalyptic number.

It is an amenable number.

12881857 is a deficient number, since it is larger than the sum of its proper divisors (7683).

12881857 is an equidigital number, since it uses as much as digits as its factorization.

12881857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7682.

The product of its digits is 35840, while the sum is 40.

The square root of 12881857 is about 3589.1303960709. The cubic root of 12881857 is about 234.4190084353.

The spelling of 12881857 in words is "twelve million, eight hundred eighty-one thousand, eight hundred fifty-seven".