2565415 has 4 divisors (see below), whose sum is σ = 3078504. Its totient is φ = 2052328.

The previous prime is 2565403. The next prime is 2565449. The reversal of 2565415 is 5145652.

2565415 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 is a cyclic number.

It is not a de Polignac number, because 2565415 - 2⁵ = 2565383 is a prime.

It is a Duffinian number.

2565415 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 256537 + ... + 256546.

It is an arithmetic number, because the mean of its divisors is an integer number (769626).

2^2565415 is an apocalyptic number.

2565415 is a deficient number, since it is larger than the sum of its proper divisors (513089).

2565415 is an equidigital number, since it uses as much as digits as its factorization.

2565415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513088.

The product of its digits is 6000, while the sum is 28.

The square root of 2565415 is about 1601.6912936019. The cubic root of 2565415 is about 136.8944611375.

It can be divided in two parts, 256 and 5415, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 2565415 in words is "two million, five hundred sixty-five thousand, four hundred fifteen".