42856842 has 16 divisors (see below), whose sum is σ = 97958592. Its totient is φ = 12244800.

The previous prime is 42856829. The next prime is 42856859. The reversal of 42856842 is 24865824.

42856842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 42856842.

It is an unprimeable 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, 510159 + ... + 510242.

It is an arithmetic number, because the mean of its divisors is an integer number (6122412).

Almost surely, 2^42856842 is an apocalyptic number.

42856842 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

42856842 is an abundant number, since it is smaller than the sum of its proper divisors (55101750).

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

42856842 is a wasteful number, since it uses less digits than its factorization.

42856842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020413.

The product of its digits is 122880, while the sum is 39.

The square root of 42856842 is about 6546.5137286956. The cubic root of 42856842 is about 349.9505834994.

The spelling of 42856842 in words is "forty-two million, eight hundred fifty-six thousand, eight hundred forty-two".