243259 has 2 divisors, whose sum is σ = 243260. Its totient is φ = 243258.

The previous prime is 243239. The next prime is 243263. The reversal of 243259 is 952342.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243259 - 2⁵ = 243227 is a prime.

It is not a weakly prime, because it can be changed into another prime (243209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121629 + 121630.

It is an arithmetic number, because the mean of its divisors is an integer number (121630).

2²⁴³²⁵⁹ is an apocalyptic number.

243259 is a deficient number, since it is larger than the sum of its proper divisors (1).

243259 is an equidigital number, since it uses as much as digits as its factorization.

243259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 243259 is about 493.2129357590. The cubic root of 243259 is about 62.4246772602.

The spelling of 243259 in words is "two hundred forty-three thousand, two hundred fifty-nine".