42030321 has 4 divisors (see below), whose sum is σ = 56040432. Its totient is φ = 28020212.

The previous prime is 42030319. The next prime is 42030343. The reversal of 42030321 is 12303024.

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 42030321 - 2¹ = 42030319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42030321.

It is not an unprimeable number, because it can be changed into a prime (42030421) 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, 7005051 + ... + 7005056.

It is an arithmetic number, because the mean of its divisors is an integer number (14010108).

Almost surely, 2^42030321 is an apocalyptic number.

It is an amenable number.

42030321 is a deficient number, since it is larger than the sum of its proper divisors (14010111).

42030321 is a wasteful number, since it uses less digits than its factorization.

42030321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14010110.

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

The square root of 42030321 is about 6483.0795922925. The cubic root of 42030321 is about 347.6862924657.

Adding to 42030321 its reverse (12303024), we get a palindrome (54333345).

The spelling of 42030321 in words is "forty-two million, thirty thousand, three hundred twenty-one".