42806859 has 8 divisors (see below), whose sum is σ = 57213072. Its totient is φ = 28469280.

The previous prime is 42806849. The next prime is 42806873. The reversal of 42806859 is 95860824.

42806859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42806859 - 2¹⁶ = 42741323 is a prime.

It is a super-3 number, since 3×42806859³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42806859.

It is not an unprimeable number, because it can be changed into a prime (42806849) by changing a digit.

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, 15684 + ... + 18209.

It is an arithmetic number, because the mean of its divisors is an integer number (7151634).

Almost surely, 2^42806859 is an apocalyptic number.

42806859 is a deficient number, since it is larger than the sum of its proper divisors (14406213).

42806859 is a wasteful number, since it uses less digits than its factorization.

42806859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34317.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 42806859 is about 6542.6950868889. The cubic root of 42806859 is about 349.8144839983.

The spelling of 42806859 in words is "forty-two million, eight hundred six thousand, eight hundred fifty-nine".