2045765 has 4 divisors (see below), whose sum is σ = 2454924. Its totient is φ = 1636608.

The previous prime is 2045761. The next prime is 2045773. The reversal of 2045765 is 5675402.

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 1378276 + 667489 = 1174^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045765 - 2² = 2045761 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045761) by changing a digit.

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, 204572 + ... + 204581.

It is an arithmetic number, because the mean of its divisors is an integer number (613731).

2^2045765 is an apocalyptic number.

It is an amenable number.

2045765 is a deficient number, since it is larger than the sum of its proper divisors (409159).

2045765 is an equidigital number, since it uses as much as digits as its factorization.

2045765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409158.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 2045765 is about 1430.3024155751. The cubic root of 2045765 is about 126.9458714917.

The spelling of 2045765 in words is "two million, forty-five thousand, seven hundred sixty-five".