42122917 has 2 divisors, whose sum is σ = 42122918. Its totient is φ = 42122916.

The previous prime is 42122903. The next prime is 42122921. The reversal of 42122917 is 71922124.

42122917 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., 37344321 + 4778596 = 6111^2 + 2186^2 .

It is a cyclic number.

It is not a de Polignac number, because 42122917 - 2¹⁹ = 41598629 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42122117) 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, 21061458 + 21061459.

It is an arithmetic number, because the mean of its divisors is an integer number (21061459).

Almost surely, 2^42122917 is an apocalyptic number.

It is an amenable number.

42122917 is a deficient number, since it is larger than the sum of its proper divisors (1).

42122917 is an equidigital number, since it uses as much as digits as its factorization.

42122917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 42122917 is about 6490.2170225656. The cubic root of 42122917 is about 347.9414316593.

The spelling of 42122917 in words is "forty-two million, one hundred twenty-two thousand, nine hundred seventeen".