243269 has 4 divisors (see below), whose sum is σ = 261996. Its totient is φ = 224544.

The previous prime is 243263. The next prime is 243301. The reversal of 243269 is 962342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 962342 = 2 ⋅481171.

It can be written as a sum of positive squares in 2 ways, for example, as 112225 + 131044 = 335^2 + 362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243269 is a prime.

It is a super-2 number, since 2×243269² = 118359612722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243269.

It is not an unprimeable number, because it can be changed into a prime (243263) 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, 9344 + ... + 9369.

It is an arithmetic number, because the mean of its divisors is an integer number (65499).

2²⁴³²⁶⁹ is an apocalyptic number.

It is an amenable number.

243269 is a deficient number, since it is larger than the sum of its proper divisors (18727).

243269 is a wasteful number, since it uses less digits than its factorization.

243269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18726.

The product of its digits is 2592, while the sum is 26.

The square root of 243269 is about 493.2230732640. The cubic root of 243269 is about 62.4255326424.

It can be divided in two parts, 243 and 269, that added together give a 9-th power (512 = 2⁹).

The spelling of 243269 in words is "two hundred forty-three thousand, two hundred sixty-nine".