12865205 has 8 divisors (see below), whose sum is σ = 15691704. Its totient is φ = 10123200.

The previous prime is 12865199. The next prime is 12865247. The reversal of 12865205 is 50256821.

12865205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 935089 + 11930116 = 967^2 + 3454^2 .

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

It is not a de Polignac number, because 12865205 - 2⁴ = 12865189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20786 + ... + 21395.

It is an arithmetic number, because the mean of its divisors is an integer number (1961463).

Almost surely, 2^12865205 is an apocalyptic number.

It is an amenable number.

12865205 is a deficient number, since it is larger than the sum of its proper divisors (2826499).

12865205 is an equidigital number, since it uses as much as digits as its factorization.

12865205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42247.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 12865205 is about 3586.8098639320. The cubic root of 12865205 is about 234.3179560136.

The spelling of 12865205 in words is "twelve million, eight hundred sixty-five thousand, two hundred five".