42430321 has 4 divisors (see below), whose sum is σ = 42819700. Its totient is φ = 42040944.

The previous prime is 42430307. The next prime is 42430327. The reversal of 42430321 is 12303424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13690000 + 28740321 = 3700^2 + 5361^2 .

It is a cyclic number.

It is not a de Polignac number, because 42430321 - 2⁹ = 42429809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42430327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194526 + ... + 194743.

It is an arithmetic number, because the mean of its divisors is an integer number (10704925).

Almost surely, 2^42430321 is an apocalyptic number.

It is an amenable number.

42430321 is a deficient number, since it is larger than the sum of its proper divisors (389379).

42430321 is a wasteful number, since it uses less digits than its factorization.

42430321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389378.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 42430321 is about 6513.8560776241. The cubic root of 42430321 is about 348.7857816261.

Adding to 42430321 its reverse (12303424), we get a palindrome (54733745).

The spelling of 42430321 in words is "forty-two million, four hundred thirty thousand, three hundred twenty-one".