42321073 has 4 divisors (see below), whose sum is σ = 43305328. Its totient is φ = 41336820.

The previous prime is 42321067. The next prime is 42321079. The reversal of 42321073 is 37012324.

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 an interprime number because it is at equal distance from previous prime (42321067) and next prime (42321079).

It is a cyclic number.

It is not a de Polignac number, because 42321073 - 2⁹ = 42320561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42321079) by changing a digit.

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, 492063 + ... + 492148.

It is an arithmetic number, because the mean of its divisors is an integer number (10826332).

Almost surely, 2^42321073 is an apocalyptic number.

42321073 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

42321073 is a deficient number, since it is larger than the sum of its proper divisors (984255).

42321073 is an equidigital number, since it uses as much as digits as its factorization.

42321073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984254.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 42321073 is about 6505.4648565648. The cubic root of 42321073 is about 348.4861774902.

Adding to 42321073 its reverse (37012324), we get a palindrome (79333397).

The spelling of 42321073 in words is "forty-two million, three hundred twenty-one thousand, seventy-three".