42578305 has 64 divisors (see below), whose sum is σ = 67852800. Its totient is φ = 25401600.

The previous prime is 42578279. The next prime is 42578317. The reversal of 42578305 is 50387524.

It is a happy number.

It is not a de Polignac number, because 42578305 - 2⁵ = 42578273 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 697975 + ... + 698035.

It is an arithmetic number, because the mean of its divisors is an integer number (1060200).

Almost surely, 2^42578305 is an apocalyptic number.

It is an amenable number.

42578305 is a deficient number, since it is larger than the sum of its proper divisors (25274495).

42578305 is a wasteful number, since it uses less digits than its factorization.

42578305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 42578305 is about 6525.2053607530. The cubic root of 42578305 is about 349.1907972253.

The spelling of 42578305 in words is "forty-two million, five hundred seventy-eight thousand, three hundred five".