259491 has 8 divisors (see below), whose sum is σ = 351424. Its totient is φ = 170280.

The previous prime is 259459. The next prime is 259499. The reversal of 259491 is 194952.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 259491 - 2⁵ = 259459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (259499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445 + ... + 846.

It is an arithmetic number, because the mean of its divisors is an integer number (43928).

2²⁵⁹⁴⁹¹ is an apocalyptic number.

259491 is a deficient number, since it is larger than the sum of its proper divisors (91933).

259491 is a wasteful number, since it uses less digits than its factorization.

259491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361.

The product of its digits is 3240, while the sum is 30.

The square root of 259491 is about 509.4025912773. The cubic root of 259491 is about 63.7833658479.

The spelling of 259491 in words is "two hundred fifty-nine thousand, four hundred ninety-one".