265243 has 4 divisors (see below), whose sum is σ = 289368. Its totient is φ = 241120.

The previous prime is 265241. The next prime is 265247. The reversal of 265243 is 342562.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 265243 - 2¹ = 265241 is a prime.

It is a Duffinian number.

265243 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (265241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12046 + ... + 12067.

It is an arithmetic number, because the mean of its divisors is an integer number (72342).

2²⁶⁵²⁴³ is an apocalyptic number.

265243 is a deficient number, since it is larger than the sum of its proper divisors (24125).

265243 is a wasteful number, since it uses less digits than its factorization.

265243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24124.

The product of its digits is 1440, while the sum is 22.

The square root of 265243 is about 515.0174754317. The cubic root of 265243 is about 64.2512099375.

The spelling of 265243 in words is "two hundred sixty-five thousand, two hundred forty-three".