42515278 has 16 divisors (see below), whose sum is σ = 70355376. Its totient is φ = 19143360.

The previous prime is 42515267. The next prime is 42515279. The reversal of 42515278 is 87251524.

It is a happy number.

42515278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42515279) 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 7 ways as a sum of consecutive naturals, for example, 18876 + ... + 21007.

It is an arithmetic number, because the mean of its divisors is an integer number (4397211).

Almost surely, 2^42515278 is an apocalyptic number.

42515278 is a deficient number, since it is larger than the sum of its proper divisors (27840098).

42515278 is a wasteful number, since it uses less digits than its factorization.

42515278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39939.

The product of its digits is 22400, while the sum is 34.

The square root of 42515278 is about 6520.3740690240. The cubic root of 42515278 is about 349.0184143123.

The spelling of 42515278 in words is "forty-two million, five hundred fifteen thousand, two hundred seventy-eight".