243459 has 16 divisors (see below), whose sum is σ = 368640. Its totient is φ = 158760.

The previous prime is 243437. The next prime is 243461. The reversal of 243459 is 954342.

It is not a de Polignac number, because 243459 - 2⁸ = 243203 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (243469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1854 + ... + 1980.

It is an arithmetic number, because the mean of its divisors is an integer number (23040).

2²⁴³⁴⁵⁹ is an apocalyptic number.

243459 is a deficient number, since it is larger than the sum of its proper divisors (125181).

243459 is a wasteful number, since it uses less digits than its factorization.

243459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 201 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 243459 is about 493.4156462862. The cubic root of 243459 is about 62.4417804513.

The spelling of 243459 in words is "two hundred forty-three thousand, four hundred fifty-nine".