42245317 has 2 divisors, whose sum is σ = 42245318. Its totient is φ = 42245316.

The previous prime is 42245311. The next prime is 42245321. The reversal of 42245317 is 71354224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33477796 + 8767521 = 5786^2 + 2961^2 .

It is a cyclic number.

It is not a de Polignac number, because 42245317 - 2¹¹ = 42243269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42245311) 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 as a sum of consecutive naturals, namely, 21122658 + 21122659.

It is an arithmetic number, because the mean of its divisors is an integer number (21122659).

Almost surely, 2^42245317 is an apocalyptic number.

It is an amenable number.

42245317 is a deficient number, since it is larger than the sum of its proper divisors (1).

42245317 is an equidigital number, since it uses as much as digits as its factorization.

42245317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 28.

The square root of 42245317 is about 6499.6397592482. The cubic root of 42245317 is about 348.2781197001.

The spelling of 42245317 in words is "forty-two million, two hundred forty-five thousand, three hundred seventeen".