2565545 has 4 divisors (see below), whose sum is σ = 3078660. Its totient is φ = 2052432.

The previous prime is 2565463. The next prime is 2565559. The reversal of 2565545 is 5455652.

2565545 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 267289 + 2298256 = 517^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565545 - 2⁸ = 2565289 is a prime.

It is a super-2 number, since 2×2565545² = 13164042294050, which contains 22 as substring.

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, 256550 + ... + 256559.

It is an arithmetic number, because the mean of its divisors is an integer number (769665).

2^2565545 is an apocalyptic number.

It is an amenable number.

2565545 is a deficient number, since it is larger than the sum of its proper divisors (513115).

2565545 is an equidigital number, since it uses as much as digits as its factorization.

2565545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513114.

The product of its digits is 30000, while the sum is 32.

The square root of 2565545 is about 1601.7318751901. The cubic root of 2565545 is about 136.8967734313.

The spelling of 2565545 in words is "two million, five hundred sixty-five thousand, five hundred forty-five".