2545765 has 16 divisors (see below), whose sum is σ = 3210480. Its totient is φ = 1935360.

The previous prime is 2545759. The next prime is 2545769. The reversal of 2545765 is 5675452.

2545765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 431649 + 2114116 = 657^2 + 1454^2 .

It is not a de Polignac number, because 2545765 - 2³ = 2545757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2545765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545769) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13975 + ... + 14155.

It is an arithmetic number, because the mean of its divisors is an integer number (200655).

2^2545765 is an apocalyptic number.

It is an amenable number.

2545765 is a deficient number, since it is larger than the sum of its proper divisors (664715).

2545765 is a wasteful number, since it uses less digits than its factorization.

2545765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312.

The product of its digits is 42000, while the sum is 34.

The square root of 2545765 is about 1595.5453613107. The cubic root of 2545765 is about 136.5440469335.

The spelling of 2545765 in words is "two million, five hundred forty-five thousand, seven hundred sixty-five".