42566525 has 6 divisors (see below), whose sum is σ = 52782522. Its totient is φ = 34053200.

The previous prime is 42566509. The next prime is 42566527. The reversal of 42566525 is 52566524.

42566525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 290521 + 42276004 = 539^2 + 6502^2 .

It is not a de Polignac number, because 42566525 - 2⁴ = 42566509 is a prime.

It is a Duffinian number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 851306 + ... + 851355.

It is an arithmetic number, because the mean of its divisors is an integer number (8797087).

Almost surely, 2^42566525 is an apocalyptic number.

It is an amenable number.

42566525 is a deficient number, since it is larger than the sum of its proper divisors (10215997).

42566525 is a wasteful number, since it uses less digits than its factorization.

42566525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702671 (or 1702666 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

The square root of 42566525 is about 6524.3026447276. The cubic root of 42566525 is about 349.1585910974.

Subtracting 42566525 from its reverse (52566524), we obtain a palindrome (9999999).

The spelling of 42566525 in words is "forty-two million, five hundred sixty-six thousand, five hundred twenty-five".