642342 has 8 divisors (see below), whose sum is σ = 1284696. Its totient is φ = 214112.

The previous prime is 642281. The next prime is 642359. The reversal of 642342 is 243246.

642342 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.

642342 is an admirable number.

It is a congruent number.

It is an unprimeable number.

642342 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53523 + ... + 53534.

It is an arithmetic number, because the mean of its divisors is an integer number (160587).

2⁶⁴²³⁴² is an apocalyptic number.

642342 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.

642342 is a wasteful number, since it uses less digits than its factorization.

642342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107062.

The product of its digits is 1152, while the sum is 21.

The square root of 642342 is about 801.4624133420. The cubic root of 642342 is about 86.2823780979.

Adding to 642342 its reverse (243246), we get a palindrome (885588).

The spelling of 642342 in words is "six hundred forty-two thousand, three hundred forty-two".