42566278 has 4 divisors (see below), whose sum is σ = 63849420. Its totient is φ = 21283138.

The previous prime is 42566267. The next prime is 42566281. The reversal of 42566278 is 87266524.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42566278.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10641568 + ... + 10641571.

It is an arithmetic number, because the mean of its divisors is an integer number (15962355).

Almost surely, 2^42566278 is an apocalyptic number.

42566278 is a deficient number, since it is larger than the sum of its proper divisors (21283142).

42566278 is a wasteful number, since it uses less digits than its factorization.

42566278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21283141.

The product of its digits is 161280, while the sum is 40.

The square root of 42566278 is about 6524.2837154741. The cubic root of 42566278 is about 349.1579157440.

The spelling of 42566278 in words is "forty-two million, five hundred sixty-six thousand, two hundred seventy-eight".