42320173 has 12 divisors (see below), whose sum is σ = 49426752. Its totient is φ = 36129240.

The previous prime is 42320143. The next prime is 42320203. The reversal of 42320173 is 37102324.

It is an interprime number because it is at equal distance from previous prime (42320143) and next prime (42320203).

It is not a de Polignac number, because 42320173 - 2⁵ = 42320141 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 (42320143) 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 11 ways as a sum of consecutive naturals, for example, 11686 + ... + 14872.

It is an arithmetic number, because the mean of its divisors is an integer number (4118896).

Almost surely, 2^42320173 is an apocalyptic number.

It is an amenable number.

42320173 is a deficient number, since it is larger than the sum of its proper divisors (7106579).

42320173 is a wasteful number, since it uses less digits than its factorization.

42320173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3472 (or 3465 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 42320173 is about 6505.3956835845. The cubic root of 42320173 is about 348.4837071702.

Adding to 42320173 its reverse (37102324), we get a palindrome (79422497).

The spelling of 42320173 in words is "forty-two million, three hundred twenty thousand, one hundred seventy-three".