259951 has 4 divisors (see below), whose sum is σ = 261504. Its totient is φ = 258400.

The previous prime is 259949. The next prime is 259967. The reversal of 259951 is 159952.

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 259951 - 2¹ = 259949 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 (259991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490 + ... + 871.

It is an arithmetic number, because the mean of its divisors is an integer number (65376).

2²⁵⁹⁹⁵¹ is an apocalyptic number.

259951 is a deficient number, since it is larger than the sum of its proper divisors (1553).

259951 is a wasteful number, since it uses less digits than its factorization.

259951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552.

The product of its digits is 4050, while the sum is 31.

The square root of 259951 is about 509.8539006421. The cubic root of 259951 is about 63.8210332148.

Subtracting from 259951 its reverse (159952), we obtain a palindrome (99999).

The spelling of 259951 in words is "two hundred fifty-nine thousand, nine hundred fifty-one".