2605685 has 4 divisors (see below), whose sum is σ = 3126828. Its totient is φ = 2084544.

The previous prime is 2605663. The next prime is 2605741. The reversal of 2605685 is 5865062.

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 1976836 + 628849 = 1406^2 + 793^2 .

It is a cyclic number.

It is not a de Polignac number, because 2605685 - 2¹⁰ = 2604661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260564 + ... + 260573.

It is an arithmetic number, because the mean of its divisors is an integer number (781707).

2^2605685 is an apocalyptic number.

It is an amenable number.

2605685 is a deficient number, since it is larger than the sum of its proper divisors (521143).

2605685 is an equidigital number, since it uses as much as digits as its factorization.

2605685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521142.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2605685 is about 1614.2134307458. The cubic root of 2605685 is about 137.6070351156.

The spelling of 2605685 in words is "two million, six hundred five thousand, six hundred eighty-five".