2605539 has 16 divisors (see below), whose sum is σ = 3760128. Its totient is φ = 1598592.

The previous prime is 2605531. The next prime is 2605543. The reversal of 2605539 is 9355062.

It is not a de Polignac number, because 2605539 - 2³ = 2605531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2605531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1854 + ... + 2940.

It is an arithmetic number, because the mean of its divisors is an integer number (235008).

2^2605539 is an apocalyptic number.

2605539 is a deficient number, since it is larger than the sum of its proper divisors (1154589).

2605539 is a wasteful number, since it uses less digits than its factorization.

2605539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 2605539 is about 1614.1682068483. The cubic root of 2605539 is about 137.6044649658.

The spelling of 2605539 in words is "two million, six hundred five thousand, five hundred thirty-nine".