42542056 has 8 divisors (see below), whose sum is σ = 79766370. Its totient is φ = 21271024.

The previous prime is 42542047. The next prime is 42542063. The reversal of 42542056 is 65024524.

It can be written as a sum of positive squares in only one way, i.e., 21473956 + 21068100 = 4634^2 + 4590^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2658871 + ... + 2658886.

Almost surely, 2^42542056 is an apocalyptic number.

It is an amenable number.

42542056 is a deficient number, since it is larger than the sum of its proper divisors (37224314).

42542056 is a wasteful number, since it uses less digits than its factorization.

42542056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5317763 (or 5317759 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 42542056 is about 6522.4271555917. The cubic root of 42542056 is about 349.0916746715.

The spelling of 42542056 in words is "forty-two million, five hundred forty-two thousand, fifty-six".