5642665 has 16 divisors (see below), whose sum is σ = 7780608. Its totient is φ = 3848256.

The previous prime is 5642653. The next prime is 5642669. The reversal of 5642665 is 5662465.

It is a cyclic number.

It is not a de Polignac number, because 5642665 - 2⁵ = 5642633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5642665.

It is not an unprimeable number, because it can be changed into a prime (5642669) 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 15 ways as a sum of consecutive naturals, for example, 8899 + ... + 9511.

It is an arithmetic number, because the mean of its divisors is an integer number (486288).

Almost surely, 2^5642665 is an apocalyptic number.

It is an amenable number.

5642665 is a deficient number, since it is larger than the sum of its proper divisors (2137943).

5642665 is a wasteful number, since it uses less digits than its factorization.

5642665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its digits is 43200, while the sum is 34.

The square root of 5642665 is about 2375.4294348601. The cubic root of 5642665 is about 178.0306411081.

Adding to 5642665 its product of digits (43200), we get a palindrome (5685865).

The spelling of 5642665 in words is "five million, six hundred forty-two thousand, six hundred sixty-five".