12871885 has 12 divisors (see below), whose sum is σ = 16726932. Its totient is φ = 9504768.

The previous prime is 12871877. The next prime is 12871891. The reversal of 12871885 is 58817821.

It can be written as a sum of positive squares in 6 ways, for example, as 4743684 + 8128201 = 2178^2 + 2851^2 .

It is not a de Polignac number, because 12871885 - 2³ = 12871877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 6772 + ... + 8461.

It is an arithmetic number, because the mean of its divisors is an integer number (1393911).

Almost surely, 2^12871885 is an apocalyptic number.

It is an amenable number.

12871885 is a deficient number, since it is larger than the sum of its proper divisors (3855047).

12871885 is a wasteful number, since it uses less digits than its factorization.

12871885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15264 (or 15251 counting only the distinct ones).

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

The square root of 12871885 is about 3587.7409326762. The cubic root of 12871885 is about 234.3585039649.

The spelling of 12871885 in words is "twelve million, eight hundred seventy-one thousand, eight hundred eighty-five".