42431173 has 4 divisors (see below), whose sum is σ = 43126828. Its totient is φ = 41735520.

The previous prime is 42431143. The next prime is 42431197. The reversal of 42431173 is 37113424.

42431173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 19554084 + 22877089 = 4422^2 + 4783^2 .

It is a cyclic number.

It is not a de Polignac number, because 42431173 - 2⁵ = 42431141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42431143) 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 in 3 ways as a sum of consecutive naturals, for example, 347736 + ... + 347857.

It is an arithmetic number, because the mean of its divisors is an integer number (10781707).

Almost surely, 2^42431173 is an apocalyptic number.

It is an amenable number.

42431173 is a deficient number, since it is larger than the sum of its proper divisors (695655).

42431173 is an equidigital number, since it uses as much as digits as its factorization.

42431173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695654.

The product of its digits is 2016, while the sum is 25.

The square root of 42431173 is about 6513.9214763459. The cubic root of 42431173 is about 348.7881161476.

Adding to 42431173 its reverse (37113424), we get a palindrome (79544597).

The spelling of 42431173 in words is "forty-two million, four hundred thirty-one thousand, one hundred seventy-three".