12871945 has 16 divisors (see below), whose sum is σ = 15863040. Its totient is φ = 10024000.

The previous prime is 12871933. The next prime is 12872003. The reversal of 12871945 is 54917821.

It is not a de Polignac number, because 12871945 - 2²³ = 4483337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35676 + ... + 36034.

It is an arithmetic number, because the mean of its divisors is an integer number (991440).

Almost surely, 2^12871945 is an apocalyptic number.

It is an amenable number.

12871945 is a deficient number, since it is larger than the sum of its proper divisors (2991095).

12871945 is a wasteful number, since it uses less digits than its factorization.

12871945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536.

The product of its digits is 20160, while the sum is 37.

The square root of 12871945 is about 3587.7492944742. The cubic root of 12871945 is about 234.3588681045.

The spelling of 12871945 in words is "twelve million, eight hundred seventy-one thousand, nine hundred forty-five".