2539645 has 16 divisors (see below), whose sum is σ = 3172608. Its totient is φ = 1950400.

The previous prime is 2539639. The next prime is 2539651. The reversal of 2539645 is 5469352.

2539645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2539639) and next prime (2539651).

It is a de Polignac number, because none of the positive numbers 2^k-2539645 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2539645.

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 15 ways as a sum of consecutive naturals, for example, 23682 + ... + 23788.

It is an arithmetic number, because the mean of its divisors is an integer number (198288).

2^2539645 is an apocalyptic number.

It is an amenable number.

2539645 is a deficient number, since it is larger than the sum of its proper divisors (632963).

2539645 is a wasteful number, since it uses less digits than its factorization.

2539645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260.

The product of its digits is 32400, while the sum is 34.

The square root of 2539645 is about 1593.6263677537. The cubic root of 2539645 is about 136.4345421815.

The spelling of 2539645 in words is "two million, five hundred thirty-nine thousand, six hundred forty-five".