42321385 has 16 divisors (see below), whose sum is σ = 52598016. Its totient is φ = 32669568.

The previous prime is 42321371. The next prime is 42321397. The reversal of 42321385 is 58312324.

42321385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42321385 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 15922 + ... + 18388.

It is an arithmetic number, because the mean of its divisors is an integer number (3287376).

Almost surely, 2^42321385 is an apocalyptic number.

It is an amenable number.

42321385 is a deficient number, since it is larger than the sum of its proper divisors (10276631).

42321385 is a wasteful number, since it uses less digits than its factorization.

42321385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592.

The product of its digits is 5760, while the sum is 28.

The square root of 42321385 is about 6505.4888363596. The cubic root of 42321385 is about 348.4870338596.

The spelling of 42321385 in words is "forty-two million, three hundred twenty-one thousand, three hundred eighty-five".