259438 has 4 divisors (see below), whose sum is σ = 389160. Its totient is φ = 129718.

The previous prime is 259429. The next prime is 259451. The reversal of 259438 is 834952.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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, 64858 + ... + 64861.

It is an arithmetic number, because the mean of its divisors is an integer number (97290).

2²⁵⁹⁴³⁸ is an apocalyptic number.

259438 is a deficient number, since it is larger than the sum of its proper divisors (129722).

259438 is a wasteful number, since it uses less digits than its factorization.

259438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129721.

The product of its digits is 8640, while the sum is 31.

The square root of 259438 is about 509.3505668987. The cubic root of 259438 is about 63.7790230530.

The spelling of 259438 in words is "two hundred fifty-nine thousand, four hundred thirty-eight".