4049645 has 4 divisors (see below), whose sum is σ = 4859580. Its totient is φ = 3239712.

The previous prime is 4049609. The next prime is 4049707. The reversal of 4049645 is 5469404.

It is a happy number.

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 1841449 + 2208196 = 1357^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 4049645 - 2⁸ = 4049389 is a prime.

It is a super-3 number, since 3×4049645³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404960 + ... + 404969.

It is an arithmetic number, because the mean of its divisors is an integer number (1214895).

Almost surely, 2^4049645 is an apocalyptic number.

It is an amenable number.

4049645 is a deficient number, since it is larger than the sum of its proper divisors (809935).

4049645 is an equidigital number, since it uses as much as digits as its factorization.

4049645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809934.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 4049645 is about 2012.3729773578. The cubic root of 4049645 is about 159.3941279105.

The spelling of 4049645 in words is "four million, forty-nine thousand, six hundred forty-five".