42531173 has 2 divisors, whose sum is σ = 42531174. Its totient is φ = 42531172.

The previous prime is 42531169. The next prime is 42531179. The reversal of 42531173 is 37113524.

42531173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25573249 + 16957924 = 5057^2 + 4118^2 .

It is a cyclic number.

It is not a de Polignac number, because 42531173 - 2² = 42531169 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42531179) 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, 21265586 + 21265587.

It is an arithmetic number, because the mean of its divisors is an integer number (21265587).

Almost surely, 2^42531173 is an apocalyptic number.

It is an amenable number.

42531173 is a deficient number, since it is larger than the sum of its proper divisors (1).

42531173 is an equidigital number, since it uses as much as digits as its factorization.

42531173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 26.

The square root of 42531173 is about 6521.5928269097. The cubic root of 42531173 is about 349.0619042195.

Adding to 42531173 its reverse (37113524), we get a palindrome (79644697).

The spelling of 42531173 in words is "forty-two million, five hundred thirty-one thousand, one hundred seventy-three".