42308557 has 4 divisors (see below), whose sum is σ = 42940096. Its totient is φ = 41677020.

The previous prime is 42308551. The next prime is 42308561. The reversal of 42308557 is 75580324.

It is a happy number.

42308557 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42308557 - 2⁷ = 42308429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42308551) by changing a digit.

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, 315669 + ... + 315802.

It is an arithmetic number, because the mean of its divisors is an integer number (10735024).

Almost surely, 2^42308557 is an apocalyptic number.

It is an amenable number.

42308557 is a deficient number, since it is larger than the sum of its proper divisors (631539).

42308557 is an equidigital number, since it uses as much as digits as its factorization.

42308557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631538.

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

The square root of 42308557 is about 6504.5028249667. The cubic root of 42308557 is about 348.4518204294.

The spelling of 42308557 in words is "forty-two million, three hundred eight thousand, five hundred fifty-seven".