642235134 has 8 divisors (see below), whose sum is σ = 1284470280. Its totient is φ = 214078376.

The previous prime is 642235127. The next prime is 642235177. The reversal of 642235134 is 431532246.

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

642235134 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53519589 + ... + 53519600.

It is an arithmetic number, because the mean of its divisors is an integer number (160558785).

Almost surely, 2^642235134 is an apocalyptic number.

642235134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642235134 is a wasteful number, since it uses less digits than its factorization.

642235134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107039194.

The product of its digits is 17280, while the sum is 30.

The square root of 642235134 is about 25342.3584932421. The cubic root of 642235134 is about 862.7759291912.

The spelling of 642235134 in words is "six hundred forty-two million, two hundred thirty-five thousand, one hundred thirty-four".