12956871 has 8 divisors (see below), whose sum is σ = 17345664. Its totient is φ = 8603000.

The previous prime is 12956863. The next prime is 12956903. The reversal of 12956871 is 17865921.

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

It is a cyclic number.

It is not a de Polignac number, because 12956871 - 2³ = 12956863 is a prime.

It is a super-2 number, since 2×12956871² = 335761012221282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12956831) 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, 7851 + ... + 9356.

It is an arithmetic number, because the mean of its divisors is an integer number (2168208).

Almost surely, 2^12956871 is an apocalyptic number.

12956871 is a deficient number, since it is larger than the sum of its proper divisors (4388793).

12956871 is a wasteful number, since it uses less digits than its factorization.

12956871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17461.

The product of its digits is 30240, while the sum is 39.

The square root of 12956871 is about 3599.5653904326. The cubic root of 12956871 is about 234.8731532127.

The spelling of 12956871 in words is "twelve million, nine hundred fifty-six thousand, eight hundred seventy-one".