12856205 has 8 divisors (see below), whose sum is σ = 15844632. Its totient is φ = 10006848.

The previous prime is 12856201. The next prime is 12856211. The reversal of 12856205 is 50265821.

12856205 is digitally balanced in base 3, 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 7557001 + 5299204 = 2749^2 + 2302^2 .

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 12856205 - 2² = 12856201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12856201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34562 + ... + 34931.

It is an arithmetic number, because the mean of its divisors is an integer number (1980579).

Almost surely, 2^12856205 is an apocalyptic number.

It is an amenable number.

12856205 is a deficient number, since it is larger than the sum of its proper divisors (2988427).

12856205 is an equidigital number, since it uses as much as digits as its factorization.

12856205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69535.

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

The square root of 12856205 is about 3585.5550476879. Note that the first 3 decimals coincide. The cubic root of 12856205 is about 234.2633033399.

The spelling of 12856205 in words is "twelve million, eight hundred fifty-six thousand, two hundred five".