42526521 has 6 divisors (see below), whose sum is σ = 61427210. Its totient is φ = 28351008.

The previous prime is 42526507. The next prime is 42526543. The reversal of 42526521 is 12562524.

42526521 is a `hidden beast` number, since 4 + 2 + 5 + 2 + 652 + 1 = 666.

42526521 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 only one way, i.e., 31236921 + 11289600 = 5589^2 + 3360^2 .

It is not a de Polignac number, because 42526521 - 2⁵ = 42526489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42526021) 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, 2362576 + ... + 2362593.

Almost surely, 2^42526521 is an apocalyptic number.

It is an amenable number.

42526521 is a deficient number, since it is larger than the sum of its proper divisors (18900689).

42526521 is a wasteful number, since it uses less digits than its factorization.

42526521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4725175 (or 4725172 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 42526521 is about 6521.2361558220. The cubic root of 42526521 is about 349.0491771218.

The spelling of 42526521 in words is "forty-two million, five hundred twenty-six thousand, five hundred twenty-one".