42857885 has 16 divisors (see below), whose sum is σ = 60145536. Its totient is φ = 28703808.

The previous prime is 42857873. The next prime is 42857891. The reversal of 42857885 is 58875824.

It is not a de Polignac number, because 42857885 - 2⁴ = 42857869 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12734 + ... + 15743.

It is an arithmetic number, because the mean of its divisors is an integer number (3759096).

Almost surely, 2^42857885 is an apocalyptic number.

It is an amenable number.

42857885 is a deficient number, since it is larger than the sum of its proper divisors (17287651).

42857885 is a wasteful number, since it uses less digits than its factorization.

42857885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28532.

The product of its digits is 716800, while the sum is 47.

The square root of 42857885 is about 6546.5933889314. The cubic root of 42857885 is about 349.9534223732.

The spelling of 42857885 in words is "forty-two million, eight hundred fifty-seven thousand, eight hundred eighty-five".