642230 has 8 divisors (see below), whose sum is σ = 1156032. Its totient is φ = 256888.

The previous prime is 642223. The next prime is 642233. The reversal of 642230 is 32246.

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

It is a junction number, because it is equal to n+sod(n) for n = 642199 and 642208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642233) by changing a digit.

642230 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32102 + ... + 32121.

It is an arithmetic number, because the mean of its divisors is an integer number (144504).

2⁶⁴²²³⁰ is an apocalyptic number.

642230 is a deficient number, since it is larger than the sum of its proper divisors (513802).

642230 is a wasteful number, since it uses less digits than its factorization.

642230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64230.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 642230 is about 801.3925380237. The cubic root of 642230 is about 86.2773630187.

Adding to 642230 its reverse (32246), we get a palindrome (674476).

The spelling of 642230 in words is "six hundred forty-two thousand, two hundred thirty".