42578487 has 64 divisors (see below), whose sum is σ = 77414400. Its totient is φ = 22589280.

The previous prime is 42578483. The next prime is 42578509. The reversal of 42578487 is 78487524.

42578487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42578487 - 2² = 42578483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42578483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 254878 + ... + 255044.

It is an arithmetic number, because the mean of its divisors is an integer number (1209600).

Almost surely, 2^42578487 is an apocalyptic number.

42578487 is a deficient number, since it is larger than the sum of its proper divisors (34835913).

42578487 is a wasteful number, since it uses less digits than its factorization.

42578487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 267 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 42578487 is about 6525.2193066594. The cubic root of 42578487 is about 349.1912947606.

The spelling of 42578487 in words is "forty-two million, five hundred seventy-eight thousand, four hundred eighty-seven".