259669 has 4 divisors (see below), whose sum is σ = 262444. Its totient is φ = 256896.

The previous prime is 259667. The next prime is 259681. The reversal of 259669 is 966952.

It is a happy number.

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 46225 + 213444 = 215^2 + 462^2 .

It is a cyclic number.

It is not a de Polignac number, because 259669 - 2¹ = 259667 is a prime.

It is a super-2 number, since 2×259669² = 134855979122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259667) 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, 1242 + ... + 1435.

It is an arithmetic number, because the mean of its divisors is an integer number (65611).

2²⁵⁹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

259669 is a deficient number, since it is larger than the sum of its proper divisors (2775).

259669 is an equidigital number, since it uses as much as digits as its factorization.

259669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2774.

The product of its digits is 29160, while the sum is 37.

The square root of 259669 is about 509.5772757885. The cubic root of 259669 is about 63.7979467570.

The spelling of 259669 in words is "two hundred fifty-nine thousand, six hundred sixty-nine".