42078012 has 36 divisors (see below), whose sum is σ = 99574440. Its totient is φ = 13829792.

The previous prime is 42077999. The next prime is 42078059. The reversal of 42078012 is 21087024.

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 11 ways as a sum of consecutive naturals, for example, 82414 + ... + 82922.

Almost surely, 2^42078012 is an apocalyptic number.

It is an amenable number.

42078012 is an abundant number, since it is smaller than the sum of its proper divisors (57496428).

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

42078012 is a wasteful number, since it uses less digits than its factorization.

42078012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 42078012 is about 6486.7566626165. The cubic root of 42078012 is about 347.8177470835.

The spelling of 42078012 in words is "forty-two million, seventy-eight thousand, twelve".