4065649 has 4 divisors (see below), whose sum is σ = 4646464. Its totient is φ = 3484836.

The previous prime is 4065637. The next prime is 4065653. The reversal of 4065649 is 9465604.

4065649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4065649 - 2⁹ = 4065137 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 (4005649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290397 + ... + 290410.

It is an arithmetic number, because the mean of its divisors is an integer number (1161616).

Almost surely, 2^4065649 is an apocalyptic number.

It is an amenable number.

4065649 is a deficient number, since it is larger than the sum of its proper divisors (580815).

4065649 is an equidigital number, since it uses as much as digits as its factorization.

4065649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580814.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 4065649 is about 2016.3454565128. The cubic root of 4065649 is about 159.6038245284.

The spelling of 4065649 in words is "four million, sixty-five thousand, six hundred forty-nine".