42438559 has 2 divisors, whose sum is σ = 42438560. Its totient is φ = 42438558.

The previous prime is 42438497. The next prime is 42438581. The reversal of 42438559 is 95583424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42438559 - 2⁹ = 42438047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42438359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21219279 + 21219280.

It is an arithmetic number, because the mean of its divisors is an integer number (21219280).

Almost surely, 2^42438559 is an apocalyptic number.

42438559 is a deficient number, since it is larger than the sum of its proper divisors (1).

42438559 is an equidigital number, since it uses as much as digits as its factorization.

42438559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 40.

The square root of 42438559 is about 6514.4883912706. The cubic root of 42438559 is about 348.8083528383.

It can be divided in two parts, 424 and 38559, that added together give a palindrome (38983).

The spelling of 42438559 in words is "forty-two million, four hundred thirty-eight thousand, five hundred fifty-nine".