12865143 has 8 divisors (see below), whose sum is σ = 17201008. Its totient is φ = 8553024.

The previous prime is 12865133. The next prime is 12865157. The reversal of 12865143 is 34156821.

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

It is not a de Polignac number, because 12865143 - 2¹² = 12861047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12865143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12865123) 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, 4630 + ... + 6867.

It is an arithmetic number, because the mean of its divisors is an integer number (2150126).

Almost surely, 2^12865143 is an apocalyptic number.

12865143 is a deficient number, since it is larger than the sum of its proper divisors (4335865).

12865143 is a wasteful number, since it uses less digits than its factorization.

12865143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11873.

The product of its digits is 5760, while the sum is 30.

The square root of 12865143 is about 3586.8012211440. The cubic root of 12865143 is about 234.3175796046.

The spelling of 12865143 in words is "twelve million, eight hundred sixty-five thousand, one hundred forty-three".