261259 has 4 divisors (see below), whose sum is σ = 263304. Its totient is φ = 259216.

The previous prime is 261251. The next prime is 261271. The reversal of 261259 is 952162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 952162 = 2 ⋅476081.

It is a cyclic number.

It is not a de Polignac number, because 261259 - 2³ = 261251 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (261251) 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, 817 + ... + 1090.

It is an arithmetic number, because the mean of its divisors is an integer number (65826).

2²⁶¹²⁵⁹ is an apocalyptic number.

261259 is a deficient number, since it is larger than the sum of its proper divisors (2045).

261259 is a wasteful number, since it uses less digits than its factorization.

261259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044.

The product of its digits is 1080, while the sum is 25.

The square root of 261259 is about 511.1350115185. The cubic root of 261259 is about 63.9278973149.

The spelling of 261259 in words is "two hundred sixty-one thousand, two hundred fifty-nine".