642330 has 80 divisors (see below), whose sum is σ = 1890504. Its totient is φ = 155520.

The previous prime is 642281. The next prime is 642359. The reversal of 642330 is 33246.

642330 is nontrivially palindromic in base 8.

642330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 210681 + 431649 = 459^2 + 657^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10500 + ... + 10560.

2⁶⁴²³³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945252).

642330 is an abundant number, since it is smaller than the sum of its proper divisors (1248174).

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

642330 is a wasteful number, since it uses less digits than its factorization.

642330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 642330 is about 801.4549269922. The cubic root of 642330 is about 86.2818407959.

Adding to 642330 its reverse (33246), we get a palindrome (675576).

The spelling of 642330 in words is "six hundred forty-two thousand, three hundred thirty".