42578135 has 4 divisors (see below), whose sum is σ = 51093768. Its totient is φ = 34062504.

The previous prime is 42578113. The next prime is 42578143. The reversal of 42578135 is 53187524.

It is a happy number.

42578135 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 a cyclic number.

It is not a de Polignac number, because 42578135 - 2⁶ = 42578071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42578095 and 42578104.

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, 4257809 + ... + 4257818.

It is an arithmetic number, because the mean of its divisors is an integer number (12773442).

Almost surely, 2^42578135 is an apocalyptic number.

42578135 is a deficient number, since it is larger than the sum of its proper divisors (8515633).

42578135 is an equidigital number, since it uses as much as digits as its factorization.

42578135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8515632.

The product of its digits is 33600, while the sum is 35.

The square root of 42578135 is about 6525.1923343301. The cubic root of 42578135 is about 349.1903324932.

The spelling of 42578135 in words is "forty-two million, five hundred seventy-eight thousand, one hundred thirty-five".