12871871 has 4 divisors (see below), whose sum is σ = 13048272. Its totient is φ = 12695472.

The previous prime is 12871849. The next prime is 12871877. The reversal of 12871871 is 17817821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12871871 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12871877) 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 3 ways as a sum of consecutive naturals, for example, 88091 + ... + 88236.

It is an arithmetic number, because the mean of its divisors is an integer number (3262068).

Almost surely, 2^12871871 is an apocalyptic number.

12871871 is a deficient number, since it is larger than the sum of its proper divisors (176401).

12871871 is an equidigital number, since it uses as much as digits as its factorization.

12871871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176400.

The product of its digits is 6272, while the sum is 35.

The square root of 12871871 is about 3587.7389815871. The cubic root of 12871871 is about 234.3584189988.

The spelling of 12871871 in words is "twelve million, eight hundred seventy-one thousand, eight hundred seventy-one".