2045645 has 16 divisors (see below), whose sum is σ = 2828928. Its totient is φ = 1391040.

The previous prime is 2045629. The next prime is 2045647. The reversal of 2045645 is 5465402.

It is not a de Polignac number, because 2045645 - 2⁴ = 2045629 is a prime.

It is a super-3 number, since 3×2045645³ = 25681007687870133375, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045647) 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, 7247 + ... + 7523.

It is an arithmetic number, because the mean of its divisors is an integer number (176808).

2^2045645 is an apocalyptic number.

It is an amenable number.

2045645 is a deficient number, since it is larger than the sum of its proper divisors (783283).

2045645 is a wasteful number, since it uses less digits than its factorization.

2045645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2045645 is about 1430.2604657894. The cubic root of 2045645 is about 126.9433893228.

The spelling of 2045645 in words is "two million, forty-five thousand, six hundred forty-five".