2606005 has 4 divisors (see below), whose sum is σ = 3127212. Its totient is φ = 2084800.

The previous prime is 2605991. The next prime is 2606011. The reversal of 2606005 is 5006062.

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 643204 + 1962801 = 802^2 + 1401^2 .

It is not a de Polignac number, because 2606005 - 2¹⁵ = 2573237 is a prime.

It is a Duffinian number.

2606005 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260596 + ... + 260605.

It is an arithmetic number, because the mean of its divisors is an integer number (781803).

2^2606005 is an apocalyptic number.

It is an amenable number.

2606005 is a deficient number, since it is larger than the sum of its proper divisors (521207).

2606005 is an equidigital number, since it uses as much as digits as its factorization.

2606005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521206.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2606005 is about 1614.3125471853. The cubic root of 2606005 is about 137.6126679848.

The spelling of 2606005 in words is "two million, six hundred six thousand, five".