42856673 has 2 divisors, whose sum is σ = 42856674. Its totient is φ = 42856672.

The previous prime is 42856661. The next prime is 42856679. The reversal of 42856673 is 37665824.

It is a happy number.

42856673 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., 34023889 + 8832784 = 5833^2 + 2972^2 .

It is a cyclic number.

It is not a de Polignac number, because 42856673 - 2⁸ = 42856417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42856673.

It is not a weakly prime, because it can be changed into another prime (42856679) 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, 21428336 + 21428337.

It is an arithmetic number, because the mean of its divisors is an integer number (21428337).

Almost surely, 2^42856673 is an apocalyptic number.

It is an amenable number.

42856673 is a deficient number, since it is larger than the sum of its proper divisors (1).

42856673 is an equidigital number, since it uses as much as digits as its factorization.

42856673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 41.

The square root of 42856673 is about 6546.5008210494. The cubic root of 42856673 is about 349.9501235050.

The spelling of 42856673 in words is "forty-two million, eight hundred fifty-six thousand, six hundred seventy-three".