42170773 has 2 divisors, whose sum is σ = 42170774. Its totient is φ = 42170772.

The previous prime is 42170767. The next prime is 42170783. The reversal of 42170773 is 37707124.

42170773 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., 42016324 + 154449 = 6482^2 + 393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42170773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42170783) 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, 21085386 + 21085387.

It is an arithmetic number, because the mean of its divisors is an integer number (21085387).

Almost surely, 2^42170773 is an apocalyptic number.

It is an amenable number.

42170773 is a deficient number, since it is larger than the sum of its proper divisors (1).

42170773 is an equidigital number, since it uses as much as digits as its factorization.

42170773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 42170773 is about 6493.9027556624. The cubic root of 42170773 is about 348.0731476351.

Adding to 42170773 its reverse (37707124), we get a palindrome (79877897).

The spelling of 42170773 in words is "forty-two million, one hundred seventy thousand, seven hundred seventy-three".