2565867 has 8 divisors (see below), whose sum is σ = 3431824. Its totient is φ = 1705248.

The previous prime is 2565863. The next prime is 2565881. The reversal of 2565867 is 7685652.

It is a happy number.

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

It is not a de Polignac number, because 2565867 - 2² = 2565863 is a prime.

It is a Duffinian number.

2565867 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2565863) 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 7 ways as a sum of consecutive naturals, for example, 28 + ... + 2265.

It is an arithmetic number, because the mean of its divisors is an integer number (428978).

2^2565867 is an apocalyptic number.

2565867 is a deficient number, since it is larger than the sum of its proper divisors (865957).

2565867 is a wasteful number, since it uses less digits than its factorization.

2565867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2669.

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

The square root of 2565867 is about 1601.8323882354. The cubic root of 2565867 is about 136.9025004688.

The spelling of 2565867 in words is "two million, five hundred sixty-five thousand, eight hundred sixty-seven".