2645785 has 4 divisors (see below), whose sum is σ = 3174948. Its totient is φ = 2116624.

The previous prime is 2645779. The next prime is 2645809. The reversal of 2645785 is 5875462.

It is a happy number.

2645785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5875462 = 2 ⋅2937731.

It can be written as a sum of positive squares in 2 ways, for example, as 549081 + 2096704 = 741^2 + 1448^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645785 - 2³ = 2645777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264574 + ... + 264583.

It is an arithmetic number, because the mean of its divisors is an integer number (793737).

2^2645785 is an apocalyptic number.

It is an amenable number.

2645785 is a deficient number, since it is larger than the sum of its proper divisors (529163).

2645785 is an equidigital number, since it uses as much as digits as its factorization.

2645785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529162.

The product of its digits is 67200, while the sum is 37.

The square root of 2645785 is about 1626.5869174440. The cubic root of 2645785 is about 138.3093424630.

The spelling of 2645785 in words is "two million, six hundred forty-five thousand, seven hundred eighty-five".