42530273 has 2 divisors, whose sum is σ = 42530274. Its totient is φ = 42530272.

The previous prime is 42530251. The next prime is 42530281. The reversal of 42530273 is 37203524.

42530273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33721249 + 8809024 = 5807^2 + 2968^2 .

It is a cyclic number.

It is not a de Polignac number, because 42530273 - 2⁸ = 42530017 is a prime.

It is a super-3 number, since 3×42530273³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42530573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21265136 + 21265137.

It is an arithmetic number, because the mean of its divisors is an integer number (21265137).

Almost surely, 2^42530273 is an apocalyptic number.

It is an amenable number.

42530273 is a deficient number, since it is larger than the sum of its proper divisors (1).

42530273 is an equidigital number, since it uses as much as digits as its factorization.

42530273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 42530273 is about 6521.5238249967. The cubic root of 42530273 is about 349.0594420417.

Adding to 42530273 its reverse (37203524), we get a palindrome (79733797).

The spelling of 42530273 in words is "forty-two million, five hundred thirty thousand, two hundred seventy-three".