4045609 has 4 divisors (see below), whose sum is σ = 4283604. Its totient is φ = 3807616.

The previous prime is 4045603. The next prime is 4045633. The reversal of 4045609 is 9065404.

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 3515625 + 529984 = 1875^2 + 728^2 .

It is a cyclic number.

It is not a de Polignac number, because 4045609 - 2⁵ = 4045577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4045603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118972 + ... + 119005.

It is an arithmetic number, because the mean of its divisors is an integer number (1070901).

Almost surely, 2^4045609 is an apocalyptic number.

It is an amenable number.

4045609 is a deficient number, since it is larger than the sum of its proper divisors (237995).

4045609 is a wasteful number, since it uses less digits than its factorization.

4045609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237994.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 4045609 is about 2011.3699311663. The cubic root of 4045609 is about 159.3411579560.

The spelling of 4045609 in words is "four million, forty-five thousand, six hundred nine".