243249 has 4 divisors (see below), whose sum is σ = 324336. Its totient is φ = 162164.

The previous prime is 243239. The next prime is 243259. The reversal of 243249 is 942342.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (243239) and next prime (243259).

It is a cyclic number.

It is not a de Polignac number, because 243249 - 2⁴ = 243233 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243249.

It is not an unprimeable number, because it can be changed into a prime (243209) 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, 40539 + ... + 40544.

It is an arithmetic number, because the mean of its divisors is an integer number (81084).

2²⁴³²⁴⁹ is an apocalyptic number.

It is an amenable number.

243249 is a deficient number, since it is larger than the sum of its proper divisors (81087).

243249 is an equidigital number, since it uses as much as digits as its factorization.

243249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81086.

The product of its digits is 1728, while the sum is 24.

The square root of 243249 is about 493.2027980456. The cubic root of 243249 is about 62.4238218546.

The spelling of 243249 in words is "two hundred forty-three thousand, two hundred forty-nine".