42543959 has 2 divisors, whose sum is σ = 42543960. Its totient is φ = 42543958.

The previous prime is 42543947. The next prime is 42543961. The reversal of 42543959 is 95934524.

42543959 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 is a cyclic number.

It is not a de Polignac number, because 42543959 - 2²⁰ = 41495383 is a prime.

Together with 42543961, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42543359) 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, 21271979 + 21271980.

It is an arithmetic number, because the mean of its divisors is an integer number (21271980).

Almost surely, 2^42543959 is an apocalyptic number.

42543959 is a deficient number, since it is larger than the sum of its proper divisors (1).

42543959 is an equidigital number, since it uses as much as digits as its factorization.

42543959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 41.

The square root of 42543959 is about 6522.5730352369. The cubic root of 42543959 is about 349.0968798074.

The spelling of 42543959 in words is "forty-two million, five hundred forty-three thousand, nine hundred fifty-nine".