42504785 has 4 divisors (see below), whose sum is σ = 51005748. Its totient is φ = 34003824.

The previous prime is 42504731. The next prime is 42504809. The reversal of 42504785 is 58740524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27636049 + 14868736 = 5257^2 + 3856^2 .

It is a cyclic number.

It is not a de Polignac number, because 42504785 - 2¹⁰ = 42503761 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4250474 + ... + 4250483.

It is an arithmetic number, because the mean of its divisors is an integer number (12751437).

Almost surely, 2^42504785 is an apocalyptic number.

It is an amenable number.

42504785 is a deficient number, since it is larger than the sum of its proper divisors (8500963).

42504785 is an equidigital number, since it uses as much as digits as its factorization.

42504785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8500962.

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 42504785 is about 6519.5693876206. The cubic root of 42504785 is about 348.9896987406.

The spelling of 42504785 in words is "forty-two million, five hundred four thousand, seven hundred eighty-five".