2045309 has 16 divisors (see below), whose sum is σ = 2448000. Its totient is φ = 1707552.

The previous prime is 2045213. The next prime is 2045311. The reversal of 2045309 is 9035402.

It is not a de Polignac number, because 2045309 - 2⁸ = 2045053 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 (2045339) 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, 22937 + ... + 23025.

It is an arithmetic number, because the mean of its divisors is an integer number (153000).

2^2045309 is an apocalyptic number.

It is an amenable number.

2045309 is a deficient number, since it is larger than the sum of its proper divisors (402691).

2045309 is an frugal number, since it uses more digits than its factorization.

2045309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2045309 is about 1430.1429998430. The cubic root of 2045309 is about 126.9364387336.

The spelling of 2045309 in words is "two million, forty-five thousand, three hundred nine".