2542565 has 4 divisors (see below), whose sum is σ = 3051084. Its totient is φ = 2034048.

The previous prime is 2542549. The next prime is 2542567. The reversal of 2542565 is 5652452.

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 1999396 + 543169 = 1414^2 + 737^2 .

It is a cyclic number.

It is not a de Polignac number, because 2542565 - 2⁴ = 2542549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2542567) 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 3 ways as a sum of consecutive naturals, for example, 254252 + ... + 254261.

It is an arithmetic number, because the mean of its divisors is an integer number (762771).

2^2542565 is an apocalyptic number.

It is an amenable number.

2542565 is a deficient number, since it is larger than the sum of its proper divisors (508519).

2542565 is an equidigital number, since it uses as much as digits as its factorization.

2542565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508518.

The product of its digits is 12000, while the sum is 29.

The square root of 2542565 is about 1594.5422540654. The cubic root of 2542565 is about 136.4868114653.

The spelling of 2542565 in words is "two million, five hundred forty-two thousand, five hundred sixty-five".