642030 has 16 divisors (see below), whose sum is σ = 1540944. Its totient is φ = 171200.

The previous prime is 642013. The next prime is 642049. The reversal of 642030 is 30246.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

642030 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10671 + ... + 10730.

It is an arithmetic number, because the mean of its divisors is an integer number (96309).

2⁶⁴²⁰³⁰ is an apocalyptic number.

642030 is an abundant number, since it is smaller than the sum of its proper divisors (898914).

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

642030 is a wasteful number, since it uses less digits than its factorization.

642030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21411.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 642030 is about 801.2677455133. The cubic root of 642030 is about 86.2684060697.

Adding to 642030 its reverse (30246), we get a palindrome (672276).

The spelling of 642030 in words is "six hundred forty-two thousand, thirty".