42812085 has 32 divisors (see below), whose sum is σ = 73801728. Its totient is φ = 21130560.

The previous prime is 42812059. The next prime is 42812093. The reversal of 42812085 is 58021824.

It is not a de Polignac number, because 42812085 - 2⁸ = 42811829 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8694 + ... + 12696.

It is an arithmetic number, because the mean of its divisors is an integer number (2306304).

Almost surely, 2^42812085 is an apocalyptic number.

It is an amenable number.

42812085 is a deficient number, since it is larger than the sum of its proper divisors (30989643).

42812085 is a wasteful number, since it uses less digits than its factorization.

42812085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 42812085 is about 6543.0944514045. The cubic root of 42812085 is about 349.8287189142.

The spelling of 42812085 in words is "forty-two million, eight hundred twelve thousand, eighty-five".