42424073 has 4 divisors (see below), whose sum is σ = 42443028. Its totient is φ = 42405120.

The previous prime is 42424043. The next prime is 42424087. The reversal of 42424073 is 37042424.

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 20866624 + 21557449 = 4568^2 + 4643^2 .

It is a cyclic number.

It is not a de Polignac number, because 42424073 - 2¹⁰ = 42423049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42424003) 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, 5588 + ... + 10773.

It is an arithmetic number, because the mean of its divisors is an integer number (10610757).

Almost surely, 2^42424073 is an apocalyptic number.

It is an amenable number.

42424073 is a deficient number, since it is larger than the sum of its proper divisors (18955).

42424073 is a wasteful number, since it uses less digits than its factorization.

42424073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18954.

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 42424073 is about 6513.3764669333. The cubic root of 42424073 is about 348.7686608464.

Adding to 42424073 its reverse (37042424), we get a palindrome (79466497).

The spelling of 42424073 in words is "forty-two million, four hundred twenty-four thousand, seventy-three".