12871047 has 16 divisors (see below), whose sum is σ = 19796480. Its totient is φ = 7286112.

The previous prime is 12871043. The next prime is 12871049. The reversal of 12871047 is 74017821.

It is not a de Polignac number, because 12871047 - 2² = 12871043 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 (12871043) 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 15 ways as a sum of consecutive naturals, for example, 523 + ... + 5100.

It is an arithmetic number, because the mean of its divisors is an integer number (1237280).

Almost surely, 2^12871047 is an apocalyptic number.

12871047 is a deficient number, since it is larger than the sum of its proper divisors (6925433).

12871047 is a wasteful number, since it uses less digits than its factorization.

12871047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5742.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 12871047 is about 3587.6241441935. The cubic root of 12871047 is about 234.3534180305.

Adding to 12871047 its reverse (74017821), we get a palindrome (86888868).

The spelling of 12871047 in words is "twelve million, eight hundred seventy-one thousand, forty-seven".