42530865 has 16 divisors (see below), whose sum is σ = 73284288. Its totient is φ = 20938176.

The previous prime is 42530843. The next prime is 42530867. The reversal of 42530865 is 56803524.

It is not a de Polignac number, because 42530865 - 2⁵ = 42530833 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42530867) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 108859 + ... + 109248.

It is an arithmetic number, because the mean of its divisors is an integer number (4580268).

Almost surely, 2^42530865 is an apocalyptic number.

It is an amenable number.

42530865 is a deficient number, since it is larger than the sum of its proper divisors (30753423).

42530865 is a wasteful number, since it uses less digits than its factorization.

42530865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218128.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 42530865 is about 6521.5692130039. The cubic root of 42530865 is about 349.0610616115.

The spelling of 42530865 in words is "forty-two million, five hundred thirty thousand, eight hundred sixty-five".