42078525 has 12 divisors (see below), whose sum is σ = 69569952. Its totient is φ = 22441840.

The previous prime is 42078511. The next prime is 42078527. The reversal of 42078525 is 52587024.

It is not a de Polignac number, because 42078525 - 2⁷ = 42078397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42078527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280449 + ... + 280598.

It is an arithmetic number, because the mean of its divisors is an integer number (5797496).

Almost surely, 2^42078525 is an apocalyptic number.

It is an amenable number.

42078525 is a deficient number, since it is larger than the sum of its proper divisors (27491427).

42078525 is a wasteful number, since it uses less digits than its factorization.

42078525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561060 (or 561055 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 42078525 is about 6486.7962045990. The cubic root of 42078525 is about 347.8191605675.

The spelling of 42078525 in words is "forty-two million, seventy-eight thousand, five hundred twenty-five".