259409 has 4 divisors (see below), whose sum is σ = 261300. Its totient is φ = 257520.

The previous prime is 259397. The next prime is 259411. The reversal of 259409 is 904952.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9409 + 250000 = 97^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 259409 - 2¹² = 255313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (259429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722 + ... + 1019.

It is an arithmetic number, because the mean of its divisors is an integer number (65325).

2²⁵⁹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

259409 is a deficient number, since it is larger than the sum of its proper divisors (1891).

259409 is a wasteful number, since it uses less digits than its factorization.

259409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 259409 is about 509.3220984799. The cubic root of 259409 is about 63.7766465563.

It can be divided in two parts, 25 and 9409, that multiplied together give a square (235225 = 485²).

The spelling of 259409 in words is "two hundred fifty-nine thousand, four hundred nine".