642299565 has 16 divisors (see below), whose sum is σ = 1038276288. Its totient is φ = 339027456.

The previous prime is 642299549. The next prime is 642299591. The reversal of 642299565 is 565992246.

642299565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642299565 - 2⁴ = 642299549 is a prime.

It is a Curzon number.

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, 219267 + ... + 222176.

It is an arithmetic number, because the mean of its divisors is an integer number (64892268).

Almost surely, 2^642299565 is an apocalyptic number.

It is an amenable number.

642299565 is a deficient number, since it is larger than the sum of its proper divisors (395976723).

642299565 is a wasteful number, since it uses less digits than its factorization.

642299565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441548.

The product of its digits is 1166400, while the sum is 48.

The square root of 642299565 is about 25343.6296729573. The cubic root of 642299565 is about 862.8047803363.

The spelling of 642299565 in words is "six hundred forty-two million, two hundred ninety-nine thousand, five hundred sixty-five".