42003321 has 4 divisors (see below), whose sum is σ = 56004432. Its totient is φ = 28002212.

The previous prime is 42003317. The next prime is 42003323. The reversal of 42003321 is 12330024.

42003321 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 42003321 - 2² = 42003317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42003321.

It is not an unprimeable number, because it can be changed into a prime (42003323) 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, 7000551 + ... + 7000556.

It is an arithmetic number, because the mean of its divisors is an integer number (14001108).

Almost surely, 2^42003321 is an apocalyptic number.

It is an amenable number.

42003321 is a deficient number, since it is larger than the sum of its proper divisors (14001111).

42003321 is a wasteful number, since it uses less digits than its factorization.

42003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14001110.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 42003321 is about 6480.9969140557. The cubic root of 42003321 is about 347.6118260603.

Adding to 42003321 its reverse (12330024), we get a palindrome (54333345).

It can be divided in two parts, 42003 and 321, that added together give a palindrome (42324).

The spelling of 42003321 in words is "forty-two million, three thousand, three hundred twenty-one".