239261 has 4 divisors (see below), whose sum is σ = 261024. Its totient is φ = 217500.

The previous prime is 239251. The next prime is 239263. The reversal of 239261 is 162932.

239261 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 239261 - 2¹⁰ = 238237 is a prime.

It is a super-2 number, since 2×239261² = 114491652242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239263) 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, 10865 + ... + 10886.

It is an arithmetic number, because the mean of its divisors is an integer number (65256).

2²³⁹²⁶¹ is an apocalyptic number.

It is an amenable number.

239261 is a deficient number, since it is larger than the sum of its proper divisors (21763).

239261 is a wasteful number, since it uses less digits than its factorization.

239261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21762.

The product of its digits is 648, while the sum is 23.

The square root of 239261 is about 489.1431283377. The cubic root of 239261 is about 62.0807999607.

The spelling of 239261 in words is "two hundred thirty-nine thousand, two hundred sixty-one".