642059 has 4 divisors (see below), whose sum is σ = 700440. Its totient is φ = 583680.

The previous prime is 642049. The next prime is 642071. The reversal of 642059 is 950246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 642059 - 2⁸ = 641803 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 (642049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29174 + ... + 29195.

It is an arithmetic number, because the mean of its divisors is an integer number (175110).

2⁶⁴²⁰⁵⁹ is an apocalyptic number.

642059 is a deficient number, since it is larger than the sum of its proper divisors (58381).

642059 is a wasteful number, since it uses less digits than its factorization.

642059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58380.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 642059 is about 801.2858416321. The cubic root of 642059 is about 86.2697049426.

The spelling of 642059 in words is "six hundred forty-two thousand, fifty-nine".