642134 has 8 divisors (see below), whose sum is σ = 994368. Its totient is φ = 310680.

The previous prime is 642133. The next prime is 642149. The reversal of 642134 is 431246.

It is a happy number.

642134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642134.

It is not an unprimeable number, because it can be changed into a prime (642133) 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, 5117 + ... + 5240.

It is an arithmetic number, because the mean of its divisors is an integer number (124296).

2⁶⁴²¹³⁴ is an apocalyptic number.

642134 is a deficient number, since it is larger than the sum of its proper divisors (352234).

642134 is a wasteful number, since it uses less digits than its factorization.

642134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10390.

The product of its digits is 576, while the sum is 20.

The square root of 642134 is about 801.3326400441. The cubic root of 642134 is about 86.2730639153.

The spelling of 642134 in words is "six hundred forty-two thousand, one hundred thirty-four".