2605591 has 8 divisors (see below), whose sum is σ = 2699424. Its totient is φ = 2513280.

The previous prime is 2605579. The next prime is 2605609. The reversal of 2605591 is 1955062.

2605591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2605591 - 2¹¹ = 2603543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605501) 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 7 ways as a sum of consecutive naturals, for example, 3915 + ... + 4531.

It is an arithmetic number, because the mean of its divisors is an integer number (337428).

2^2605591 is an apocalyptic number.

2605591 is a deficient number, since it is larger than the sum of its proper divisors (93833).

2605591 is a wasteful number, since it uses less digits than its factorization.

2605591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 2605591 is about 1614.1843141352. The cubic root of 2605591 is about 137.6053803726.

The spelling of 2605591 in words is "two million, six hundred five thousand, five hundred ninety-one".