2605653 has 12 divisors (see below), whose sum is σ = 3807180. Its totient is φ = 1717056.

The previous prime is 2605637. The next prime is 2605661. The reversal of 2605653 is 3565062.

2605653 is a `hidden beast` number, since 2 + 6 + 0 + 5 + 653 = 666.

2605653 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 2 ways, for example, as 1790244 + 815409 = 1338^2 + 903^2 .

It is not a de Polignac number, because 2605653 - 2⁴ = 2605637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605613) 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 11 ways as a sum of consecutive naturals, for example, 826 + ... + 2427.

It is an arithmetic number, because the mean of its divisors is an integer number (317265).

2^2605653 is an apocalyptic number.

It is an amenable number.

2605653 is a deficient number, since it is larger than the sum of its proper divisors (1201527).

2605653 is a wasteful number, since it uses less digits than its factorization.

2605653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3348 (or 3345 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 2605653 is about 1614.2035187671. The cubic root of 2605653 is about 137.6064718033.

The spelling of 2605653 in words is "two million, six hundred five thousand, six hundred fifty-three".