243241 has 4 divisors (see below), whose sum is σ = 246400. Its totient is φ = 240084.

The previous prime is 243239. The next prime is 243259. The reversal of 243241 is 142342.

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, and also an emirpimes, since its reverse is a distinct semiprime: 142342 = 2 ⋅71171.

It is a cyclic number.

It is not a de Polignac number, because 243241 - 2¹ = 243239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (246241) 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, 1461 + ... + 1618.

It is an arithmetic number, because the mean of its divisors is an integer number (61600).

2²⁴³²⁴¹ is an apocalyptic number.

It is an amenable number.

243241 is a deficient number, since it is larger than the sum of its proper divisors (3159).

243241 is an equidigital number, since it uses as much as digits as its factorization.

243241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158.

The product of its digits is 192, while the sum is 16.

The square root of 243241 is about 493.1946877248. The cubic root of 243241 is about 62.4231375133.

Subtracting from 243241 its product of digits (192), we obtain a square (243049 = 493²).

Adding to 243241 its reverse (142342), we get a palindrome (385583).

It can be divided in two parts, 243 and 241, that added together give a palindrome (484).

The spelling of 243241 in words is "two hundred forty-three thousand, two hundred forty-one", and thus it is an iban number.