642599 has 8 divisors (see below), whose sum is σ = 698880. Its totient is φ = 588600.

The previous prime is 642581. The next prime is 642613. The reversal of 642599 is 995246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642599 - 2¹⁶ = 577063 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 (642529) 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 7 ways as a sum of consecutive naturals, for example, 44 + ... + 1134.

It is an arithmetic number, because the mean of its divisors is an integer number (87360).

2⁶⁴²⁵⁹⁹ is an apocalyptic number.

642599 is a deficient number, since it is larger than the sum of its proper divisors (56281).

642599 is a wasteful number, since it uses less digits than its factorization.

642599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141.

The product of its digits is 19440, while the sum is 35.

The square root of 642599 is about 801.6227292187. The cubic root of 642599 is about 86.2938837105.

The spelling of 642599 in words is "six hundred forty-two thousand, five hundred ninety-nine".