42578255 has 4 divisors (see below), whose sum is σ = 51093912. Its totient is φ = 34062600.

The previous prime is 42578219. The next prime is 42578273. The reversal of 42578255 is 55287524.

42578255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42578255 - 2¹² = 42574159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4257821 + ... + 4257830.

It is an arithmetic number, because the mean of its divisors is an integer number (12773478).

Almost surely, 2^42578255 is an apocalyptic number.

42578255 is a deficient number, since it is larger than the sum of its proper divisors (8515657).

42578255 is an equidigital number, since it uses as much as digits as its factorization.

42578255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8515656.

The product of its digits is 112000, while the sum is 38.

The square root of 42578255 is about 6525.2015294549. The cubic root of 42578255 is about 349.1906605395.

The spelling of 42578255 in words is "forty-two million, five hundred seventy-eight thousand, two hundred fifty-five".