42307885 has 4 divisors (see below), whose sum is σ = 50769468. Its totient is φ = 33846304.

The previous prime is 42307877. The next prime is 42307913. The reversal of 42307885 is 58870324.

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 27237961 + 15069924 = 5219^2 + 3882^2 .

It is a cyclic number.

It is not a de Polignac number, because 42307885 - 2³ = 42307877 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4230784 + ... + 4230793.

It is an arithmetic number, because the mean of its divisors is an integer number (12692367).

Almost surely, 2^42307885 is an apocalyptic number.

It is an amenable number.

42307885 is a deficient number, since it is larger than the sum of its proper divisors (8461583).

42307885 is an equidigital number, since it uses as much as digits as its factorization.

42307885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8461582.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 42307885 is about 6504.4511682386. The cubic root of 42307885 is about 348.4499755633.

The spelling of 42307885 in words is "forty-two million, three hundred seven thousand, eight hundred eighty-five".