42012566 has 16 divisors (see below), whose sum is σ = 63980928. Its totient is φ = 20688000.

The previous prime is 42012563. The next prime is 42012571. The reversal of 42012566 is 66521024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42012563) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 48251 + ... + 49113.

It is an arithmetic number, because the mean of its divisors is an integer number (3998808).

Almost surely, 2^42012566 is an apocalyptic number.

42012566 is a deficient number, since it is larger than the sum of its proper divisors (21968362).

42012566 is a wasteful number, since it uses less digits than its factorization.

42012566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 42012566 is about 6481.7101138511. The cubic root of 42012566 is about 347.6373275008.

The spelling of 42012566 in words is "forty-two million, twelve thousand, five hundred sixty-six".