42855859 has 2 divisors, whose sum is σ = 42855860. Its totient is φ = 42855858.

The previous prime is 42855847. The next prime is 42855863. The reversal of 42855859 is 95855824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42855859 is a prime.

It is not a weakly prime, because it can be changed into another prime (42855829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21427929 + 21427930.

It is an arithmetic number, because the mean of its divisors is an integer number (21427930).

Almost surely, 2^42855859 is an apocalyptic number.

42855859 is a deficient number, since it is larger than the sum of its proper divisors (1).

42855859 is an equidigital number, since it uses as much as digits as its factorization.

42855859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576000, while the sum is 46.

The square root of 42855859 is about 6546.4386501364. The cubic root of 42855859 is about 349.9479078935.

The spelling of 42855859 in words is "forty-two million, eight hundred fifty-five thousand, eight hundred fifty-nine".