12856045 has 4 divisors (see below), whose sum is σ = 15427260. Its totient is φ = 10284832.

The previous prime is 12856037. The next prime is 12856069. The reversal of 12856045 is 54065821.

12856045 is digitally balanced in base 2, 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 can be written as a sum of positive squares in 2 ways, for example, as 10023556 + 2832489 = 3166^2 + 1683^2 .

It is a cyclic number.

It is not a de Polignac number, because 12856045 - 2³ = 12856037 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 12855998 and 12856016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285600 + ... + 1285609.

It is an arithmetic number, because the mean of its divisors is an integer number (3856815).

Almost surely, 2^12856045 is an apocalyptic number.

It is an amenable number.

12856045 is a deficient number, since it is larger than the sum of its proper divisors (2571215).

12856045 is an equidigital number, since it uses as much as digits as its factorization.

12856045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571214.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 12856045 is about 3585.5327358706. The cubic root of 12856045 is about 234.2623315061.

The spelling of 12856045 in words is "twelve million, eight hundred fifty-six thousand, forty-five".