2645805 has 16 divisors (see below), whose sum is σ = 4417920. Its totient is φ = 1349568.

The previous prime is 2645779. The next prime is 2645809. The reversal of 2645805 is 5085462.

It is not a de Polignac number, because 2645805 - 2⁸ = 2645549 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3490 + ... + 4179.

It is an arithmetic number, because the mean of its divisors is an integer number (276120).

2^2645805 is an apocalyptic number.

It is an amenable number.

2645805 is a deficient number, since it is larger than the sum of its proper divisors (1772115).

2645805 is a wasteful number, since it uses less digits than its factorization.

2645805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7700.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 2645805 is about 1626.5930652748. The cubic root of 2645805 is about 138.3096909645.

The spelling of 2645805 in words is "two million, six hundred forty-five thousand, eight hundred five".