842578 has 8 divisors (see below), whose sum is σ = 1378800. Its totient is φ = 382980.

The previous prime is 842551. The next prime is 842581. The reversal of 842578 is 875248.

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

It is a plaindrome in base 13 and base 15.

It is an unprimeable number.

842578 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, 19128 + ... + 19171.

It is an arithmetic number, because the mean of its divisors is an integer number (172350).

2⁸⁴²⁵⁷⁸ is an apocalyptic number.

842578 is a deficient number, since it is larger than the sum of its proper divisors (536222).

842578 is a wasteful number, since it uses less digits than its factorization.

842578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38312.

The product of its digits is 17920, while the sum is 34.

The square root of 842578 is about 917.9204758583. The cubic root of 842578 is about 94.4503065437.

It can be divided in two parts, 84 and 2578, that added together give a palindrome (2662).

The spelling of 842578 in words is "eight hundred forty-two thousand, five hundred seventy-eight".