42566523 has 4 divisors (see below), whose sum is σ = 56755368. Its totient is φ = 28377680.

The previous prime is 42566509. The next prime is 42566527. The reversal of 42566523 is 32566524.

42566523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42566523 - 2⁸ = 42566267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42566527) 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 3 ways as a sum of consecutive naturals, for example, 7094418 + ... + 7094423.

It is an arithmetic number, because the mean of its divisors is an integer number (14188842).

Almost surely, 2^42566523 is an apocalyptic number.

42566523 is a deficient number, since it is larger than the sum of its proper divisors (14188845).

42566523 is a wasteful number, since it uses less digits than its factorization.

42566523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14188844.

The product of its digits is 43200, while the sum is 33.

The square root of 42566523 is about 6524.3024914545. The cubic root of 42566523 is about 349.1585856290.

Subtracting from 42566523 its reverse (32566524), we obtain a palindrome (9999999).

The spelling of 42566523 in words is "forty-two million, five hundred sixty-six thousand, five hundred twenty-three".