2565678 has 16 divisors (see below), whose sum is σ = 5152896. Its totient is φ = 851640.

The previous prime is 2565671. The next prime is 2565679. The reversal of 2565678 is 8765652.

It is a happy number.

2565678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565671) 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, 943 + ... + 2453.

It is an arithmetic number, because the mean of its divisors is an integer number (322056).

2^2565678 is an apocalyptic number.

2565678 is an abundant number, since it is smaller than the sum of its proper divisors (2587218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2565678 is a wasteful number, since it uses less digits than its factorization.

2565678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799.

The product of its digits is 100800, while the sum is 39.

The square root of 2565678 is about 1601.7733922125. The cubic root of 2565678 is about 136.8991390049.

It can be divided in two parts, 25 and 65678, that added together give a triangular number (65703 = T₃₆₂).

The spelling of 2565678 in words is "two million, five hundred sixty-five thousand, six hundred seventy-eight".