12947871 has 8 divisors (see below), whose sum is σ = 17320240. Its totient is φ = 8603712.

The previous prime is 12947867. The next prime is 12947881. The reversal of 12947871 is 17874921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12947871 - 2² = 12947867 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 (12947861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5956 + ... + 7833.

It is an arithmetic number, because the mean of its divisors is an integer number (2165030).

Almost surely, 2^12947871 is an apocalyptic number.

12947871 is a deficient number, since it is larger than the sum of its proper divisors (4372369).

12947871 is a wasteful number, since it uses less digits than its factorization.

12947871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14105.

The product of its digits is 28224, while the sum is 39.

The square root of 12947871 is about 3598.3150223403. The cubic root of 12947871 is about 234.8187587012.

The spelling of 12947871 in words is "twelve million, nine hundred forty-seven thousand, eight hundred seventy-one".