42566478 has 8 divisors (see below), whose sum is σ = 85132968. Its totient is φ = 14188824.

The previous prime is 42566449. The next prime is 42566509. The reversal of 42566478 is 87466524.

It is a sphenic number, since it is the product of 3 distinct primes.

42566478 is an admirable number.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 3547201 + ... + 3547212.

It is an arithmetic number, because the mean of its divisors is an integer number (10641621).

Almost surely, 2^42566478 is an apocalyptic number.

42566478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42566478 is a wasteful number, since it uses less digits than its factorization.

42566478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7094418.

The product of its digits is 322560, while the sum is 42.

The square root of 42566478 is about 6524.2990428091. The cubic root of 42566478 is about 349.1584625891.

The spelling of 42566478 in words is "forty-two million, five hundred sixty-six thousand, four hundred seventy-eight".