2605005 has 48 divisors (see below), whose sum is σ = 5010096. Its totient is φ = 1244160.

The previous prime is 2604997. The next prime is 2605007. The reversal of 2605005 is 5005062.

It can be written as a sum of positive squares in 8 ways, for example, as 675684 + 1929321 = 822^2 + 1389^2 .

It is not a de Polignac number, because 2605005 - 2³ = 2604997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35649 + ... + 35721.

It is an arithmetic number, because the mean of its divisors is an integer number (104377).

2^2605005 is an apocalyptic number.

It is an amenable number.

2605005 is a deficient number, since it is larger than the sum of its proper divisors (2405091).

2605005 is a wasteful number, since it uses less digits than its factorization.

2605005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 2605005 is about 1614.0027881017. The cubic root of 2605005 is about 137.5950637370.

The spelling of 2605005 in words is "two million, six hundred five thousand, five".