642883 has 4 divisors (see below), whose sum is σ = 646408. Its totient is φ = 639360.

The previous prime is 642881. The next prime is 642899. The reversal of 642883 is 388246.

It is a happy number.

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 642883 - 2¹ = 642881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642881) 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, 1473 + ... + 1858.

It is an arithmetic number, because the mean of its divisors is an integer number (161602).

2⁶⁴²⁸⁸³ is an apocalyptic number.

642883 is a deficient number, since it is larger than the sum of its proper divisors (3525).

642883 is a wasteful number, since it uses less digits than its factorization.

642883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524.

The product of its digits is 9216, while the sum is 31.

The square root of 642883 is about 801.7998503367. The cubic root of 642883 is about 86.3065945164.

The spelling of 642883 in words is "six hundred forty-two thousand, eight hundred eighty-three".