12865231 has 4 divisors (see below), whose sum is σ = 12891312. Its totient is φ = 12839152.

The previous prime is 12865199. The next prime is 12865247. The reversal of 12865231 is 13256821.

12865231 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12865231 - 2⁵ = 12865199 is a prime.

It is a super-2 number, since 2×12865231² = 331028337366722, which contains 22 as substring.

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 12865231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12865331) 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, 12286 + ... + 13291.

It is an arithmetic number, because the mean of its divisors is an integer number (3222828).

Almost surely, 2^12865231 is an apocalyptic number.

12865231 is the 2269-th centered pentagonal number.

12865231 is a deficient number, since it is larger than the sum of its proper divisors (26081).

12865231 is an equidigital number, since it uses as much as digits as its factorization.

12865231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26080.

The product of its digits is 2880, while the sum is 28.

The square root of 12865231 is about 3586.8134883208. The cubic root of 12865231 is about 234.3181138622.

The spelling of 12865231 in words is "twelve million, eight hundred sixty-five thousand, two hundred thirty-one".