2605205 has 4 divisors (see below), whose sum is σ = 3126252. Its totient is φ = 2084160.

The previous prime is 2605201. The next prime is 2605231. The reversal of 2605205 is 5025062.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 361201 + 2244004 = 601^2 + 1498^2 .

It is not a de Polignac number, because 2605205 - 2² = 2605201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260516 + ... + 260525.

It is an arithmetic number, because the mean of its divisors is an integer number (781563).

2^2605205 is an apocalyptic number.

It is an amenable number.

2605205 is a deficient number, since it is larger than the sum of its proper divisors (521047).

2605205 is an equidigital number, since it uses as much as digits as its factorization.

2605205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521046.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2605205 is about 1614.0647446741. The cubic root of 2605205 is about 137.5985849469.

The spelling of 2605205 in words is "two million, six hundred five thousand, two hundred five".