4004645 has 16 divisors (see below), whose sum is σ = 5080320. Its totient is φ = 3024384.

The previous prime is 4004629. The next prime is 4004653. The reversal of 4004645 is 5464004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4004645 - 2⁴ = 4004629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4004645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10976 + ... + 11334.

It is an arithmetic number, because the mean of its divisors is an integer number (317520).

Almost surely, 2^4004645 is an apocalyptic number.

It is an amenable number.

4004645 is a deficient number, since it is larger than the sum of its proper divisors (1075675).

4004645 is a wasteful number, since it uses less digits than its factorization.

4004645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 4004645 is about 2001.1609130702. The cubic root of 4004645 is about 158.8015270766.

Adding to 4004645 its reverse (5464004), we get a palindrome (9468649).

The spelling of 4004645 in words is "four million, four thousand, six hundred forty-five".