642334 has 32 divisors (see below), whose sum is σ = 1241856. Its totient is φ = 241920.

The previous prime is 642281. The next prime is 642359. The reversal of 642334 is 433246.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

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, 6574 + ... + 6670.

It is an arithmetic number, because the mean of its divisors is an integer number (38808).

2⁶⁴²³³⁴ is an apocalyptic number.

642334 is a deficient number, since it is larger than the sum of its proper divisors (599522).

642334 is a wasteful number, since it uses less digits than its factorization.

642334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160.

The product of its digits is 1728, while the sum is 22.

The square root of 642334 is about 801.4574224499. The cubic root of 642334 is about 86.2820198973.

The spelling of 642334 in words is "six hundred forty-two thousand, three hundred thirty-four".