259242439 has 4 divisors (see below), whose sum is σ = 261620920. Its totient is φ = 256863960.

The previous prime is 259242421. The next prime is 259242481. The reversal of 259242439 is 934242952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 259242439 - 2⁷ = 259242311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259242409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1189077 + ... + 1189294.

It is an arithmetic number, because the mean of its divisors is an integer number (65405230).

Almost surely, 2^259242439 is an apocalyptic number.

259242439 is a deficient number, since it is larger than the sum of its proper divisors (2378481).

259242439 is a wasteful number, since it uses less digits than its factorization.

259242439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378480.

The product of its digits is 155520, while the sum is 40.

The square root of 259242439 is about 16101.0073908436. The cubic root of 259242439 is about 637.6299375790.

The spelling of 259242439 in words is "two hundred fifty-nine million, two hundred forty-two thousand, four hundred thirty-nine".