42085877 has 2 divisors, whose sum is σ = 42085878. Its totient is φ = 42085876.

The previous prime is 42085867. The next prime is 42085919. The reversal of 42085877 is 77858024.

42085877 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., 40844881 + 1240996 = 6391^2 + 1114^2 .

It is a cyclic number.

It is not a de Polignac number, because 42085877 - 2⁴ = 42085861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42085847) 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, 21042938 + 21042939.

It is an arithmetic number, because the mean of its divisors is an integer number (21042939).

Almost surely, 2^42085877 is an apocalyptic number.

It is an amenable number.

42085877 is a deficient number, since it is larger than the sum of its proper divisors (1).

42085877 is an equidigital number, since it uses as much as digits as its factorization.

42085877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 42085877 is about 6487.3628694563. The cubic root of 42085877 is about 347.8394164862.

The spelling of 42085877 in words is "forty-two million, eighty-five thousand, eight hundred seventy-seven".