2605105 has 4 divisors (see below), whose sum is σ = 3126132. Its totient is φ = 2084080.

The previous prime is 2605103. The next prime is 2605139. The reversal of 2605105 is 5015062.

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 1065024 + 1540081 = 1032^2 + 1241^2 .

It is not a de Polignac number, because 2605105 - 2¹ = 2605103 is a prime.

It is a super-2 number, since 2×2605105² = 13573144122050, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2605103) 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, 260506 + ... + 260515.

It is an arithmetic number, because the mean of its divisors is an integer number (781533).

2^2605105 is an apocalyptic number.

It is an amenable number.

2605105 is a deficient number, since it is larger than the sum of its proper divisors (521027).

2605105 is an equidigital number, since it uses as much as digits as its factorization.

2605105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521026.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 2605105 is about 1614.0337666852. The cubic root of 2605105 is about 137.5968243645.

The spelling of 2605105 in words is "two million, six hundred five thousand, one hundred five".