42345073 has 4 divisors (see below), whose sum is σ = 43246080. Its totient is φ = 41444068.

The previous prime is 42345071. The next prime is 42345089. The reversal of 42345073 is 37054324.

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 42345073 - 2¹ = 42345071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42345071) 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, 450433 + ... + 450526.

It is an arithmetic number, because the mean of its divisors is an integer number (10811520).

Almost surely, 2^42345073 is an apocalyptic number.

It is an amenable number.

42345073 is a deficient number, since it is larger than the sum of its proper divisors (901007).

42345073 is an equidigital number, since it uses as much as digits as its factorization.

42345073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901006.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 42345073 is about 6507.3091981248. The cubic root of 42345073 is about 348.5520397756.

Adding to 42345073 its reverse (37054324), we get a palindrome (79399397).

The spelling of 42345073 in words is "forty-two million, three hundred forty-five thousand, seventy-three".