2542402565 has 4 divisors (see below), whose sum is σ = 3050883084. Its totient is φ = 2033922048.

The previous prime is 2542402501. The next prime is 2542402613. The reversal of 2542402565 is 5652042452.

2542402565 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 697012801 + 1845389764 = 26401^2 + 42958^2 .

It is a cyclic number.

It is not a de Polignac number, because 2542402565 - 2⁶ = 2542402501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254240252 + ... + 254240261.

It is an arithmetic number, because the mean of its divisors is an integer number (762720771).

Almost surely, 2^2542402565 is an apocalyptic number.

It is an amenable number.

2542402565 is a deficient number, since it is larger than the sum of its proper divisors (508480519).

2542402565 is an equidigital number, since it uses as much as digits as its factorization.

2542402565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508480518.

The product of its (nonzero) digits is 96000, while the sum is 35.

The square root of 2542402565 is about 50422.2427605120. The cubic root of 2542402565 is about 1364.8390485890.

The spelling of 2542402565 in words is "two billion, five hundred forty-two million, four hundred two thousand, five hundred sixty-five".