243955 has 8 divisors (see below), whose sum is σ = 296352. Its totient is φ = 192768.

The previous prime is 243953. The next prime is 243973. The reversal of 243955 is 559342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243955 - 2¹ = 243953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234 + ... + 736.

It is an arithmetic number, because the mean of its divisors is an integer number (37044).

2²⁴³⁹⁵⁵ is an apocalyptic number.

243955 is a deficient number, since it is larger than the sum of its proper divisors (52397).

243955 is an equidigital number, since it uses as much as digits as its factorization.

243955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605.

The product of its digits is 5400, while the sum is 28.

The square root of 243955 is about 493.9180093902. The cubic root of 243955 is about 62.4841559838.

The spelling of 243955 in words is "two hundred forty-three thousand, nine hundred fifty-five".