42290173 has 2 divisors, whose sum is σ = 42290174. Its totient is φ = 42290172.

The previous prime is 42290167. The next prime is 42290189. The reversal of 42290173 is 37109224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41512249 + 777924 = 6443^2 + 882^2 .

It is a cyclic number.

It is not a de Polignac number, because 42290173 - 2⁹ = 42289661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42290153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21145086 + 21145087.

It is an arithmetic number, because the mean of its divisors is an integer number (21145087).

Almost surely, 2^42290173 is an apocalyptic number.

It is an amenable number.

42290173 is a deficient number, since it is larger than the sum of its proper divisors (1).

42290173 is an equidigital number, since it uses as much as digits as its factorization.

42290173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 42290173 is about 6503.0894965393. The cubic root of 42290173 is about 348.4013431202.

Adding to 42290173 its reverse (37109224), we get a palindrome (79399397).

The spelling of 42290173 in words is "forty-two million, two hundred ninety thousand, one hundred seventy-three".