42256871 has 2 divisors, whose sum is σ = 42256872. Its totient is φ = 42256870.

The previous prime is 42256859. The next prime is 42256889. The reversal of 42256871 is 17865224.

42256871 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42256871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42256811) 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, 21128435 + 21128436.

It is an arithmetic number, because the mean of its divisors is an integer number (21128436).

Almost surely, 2^42256871 is an apocalyptic number.

42256871 is a deficient number, since it is larger than the sum of its proper divisors (1).

42256871 is an equidigital number, since it uses as much as digits as its factorization.

42256871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 35.

The square root of 42256871 is about 6500.5285169746. The cubic root of 42256871 is about 348.3098679023.

The spelling of 42256871 in words is "forty-two million, two hundred fifty-six thousand, eight hundred seventy-one".