42345847 has 2 divisors, whose sum is σ = 42345848. Its totient is φ = 42345846.

The previous prime is 42345839. The next prime is 42345911. The reversal of 42345847 is 74854324.

42345847 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 not a de Polignac number, because 42345847 - 2³ = 42345839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42340847) 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, 21172923 + 21172924.

It is an arithmetic number, because the mean of its divisors is an integer number (21172924).

Almost surely, 2^42345847 is an apocalyptic number.

42345847 is a deficient number, since it is larger than the sum of its proper divisors (1).

42345847 is an equidigital number, since it uses as much as digits as its factorization.

42345847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 37.

The square root of 42345847 is about 6507.3686694393. The cubic root of 42345847 is about 348.5541634200.

It can be divided in two parts, 42345 and 847, that multiplied together give a triangular number (35866215 = T₈₄₆₉).

The spelling of 42345847 in words is "forty-two million, three hundred forty-five thousand, eight hundred forty-seven".