42345321 has 4 divisors (see below), whose sum is σ = 56460432. Its totient is φ = 28230212.

The previous prime is 42345311. The next prime is 42345337. The reversal of 42345321 is 12354324.

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 42345321 - 2¹⁵ = 42312553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42345291 and 42345300.

It is not an unprimeable number, because it can be changed into a prime (42345311) 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, 7057551 + ... + 7057556.

It is an arithmetic number, because the mean of its divisors is an integer number (14115108).

Almost surely, 2^42345321 is an apocalyptic number.

It is an amenable number.

42345321 is a deficient number, since it is larger than the sum of its proper divisors (14115111).

42345321 is a wasteful number, since it uses less digits than its factorization.

42345321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14115110.

The product of its digits is 2880, while the sum is 24.

The square root of 42345321 is about 6507.3282535923. The cubic root of 42345321 is about 348.5527202226.

Adding to 42345321 its reverse (12354324), we get a palindrome (54699645).

The spelling of 42345321 in words is "forty-two million, three hundred forty-five thousand, three hundred twenty-one".