42235439 has 2 divisors, whose sum is σ = 42235440. Its totient is φ = 42235438.

The previous prime is 42235411. The next prime is 42235451. The reversal of 42235439 is 93453224.

42235439 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 42235439 - 2⁸ = 42235183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42235409) 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, 21117719 + 21117720.

It is an arithmetic number, because the mean of its divisors is an integer number (21117720).

Almost surely, 2^42235439 is an apocalyptic number.

42235439 is a deficient number, since it is larger than the sum of its proper divisors (1).

42235439 is an equidigital number, since it uses as much as digits as its factorization.

42235439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 32.

The square root of 42235439 is about 6498.8798265547. The cubic root of 42235439 is about 348.2509722379.

The spelling of 42235439 in words is "forty-two million, two hundred thirty-five thousand, four hundred thirty-nine".