12871289 has 4 divisors (see below), whose sum is σ = 12878580. Its totient is φ = 12864000.

The previous prime is 12871259. The next prime is 12871291. The reversal of 12871289 is 98217821.

12871289 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 brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9954025 + 2917264 = 3155^2 + 1708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12871289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12871259) 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, 857 + ... + 5145.

It is an arithmetic number, because the mean of its divisors is an integer number (3219645).

Almost surely, 2^12871289 is an apocalyptic number.

It is an amenable number.

12871289 is a deficient number, since it is larger than the sum of its proper divisors (7291).

12871289 is an equidigital number, since it uses as much as digits as its factorization.

12871289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7290.

The product of its digits is 16128, while the sum is 38.

The square root of 12871289 is about 3587.6578710908. The cubic root of 12871289 is about 234.3548867836.

It can be divided in two parts, 128 and 71289, that added together give a palindrome (71417).

The spelling of 12871289 in words is "twelve million, eight hundred seventy-one thousand, two hundred eighty-nine".