42847321 has 16 divisors (see below), whose sum is σ = 49121280. Its totient is φ = 36994320.

The previous prime is 42847319. The next prime is 42847379. The reversal of 42847321 is 12374824.

42847321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42847321 - 2¹ = 42847319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42847391) 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 15 ways as a sum of consecutive naturals, for example, 40720 + ... + 41758.

It is an arithmetic number, because the mean of its divisors is an integer number (3070080).

Almost surely, 2^42847321 is an apocalyptic number.

It is an amenable number.

42847321 is a deficient number, since it is larger than the sum of its proper divisors (6273959).

42847321 is a wasteful number, since it uses less digits than its factorization.

42847321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236.

The product of its digits is 10752, while the sum is 31.

The square root of 42847321 is about 6545.7865073649. The cubic root of 42847321 is about 349.9246667798.

The spelling of 42847321 in words is "forty-two million, eight hundred forty-seven thousand, three hundred twenty-one".