842430 has 16 divisors (see below), whose sum is σ = 2021904. Its totient is φ = 224640.

The previous prime is 842423. The next prime is 842447. The reversal of 842430 is 34248.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 842397 and 842406.

It is a congruent number.

It is an unprimeable number.

842430 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, 14011 + ... + 14070.

It is an arithmetic number, because the mean of its divisors is an integer number (126369).

2⁸⁴²⁴³⁰ is an apocalyptic number.

842430 is an abundant number, since it is smaller than the sum of its proper divisors (1179474).

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

842430 is a wasteful number, since it uses less digits than its factorization.

842430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28091.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 842430 is about 917.8398553125. The cubic root of 842430 is about 94.4447761106. Note that the first 3 decimals are identical.

Adding to 842430 its reverse (34248), we get a palindrome (876678).

The spelling of 842430 in words is "eight hundred forty-two thousand, four hundred thirty".