243406 has 8 divisors (see below), whose sum is σ = 386640. Its totient is φ = 114528.

The previous prime is 243403. The next prime is 243421. The reversal of 243406 is 604342.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243401) 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, 3546 + ... + 3613.

It is an arithmetic number, because the mean of its divisors is an integer number (48330).

2²⁴³⁴⁰⁶ is an apocalyptic number.

243406 is a deficient number, since it is larger than the sum of its proper divisors (143234).

243406 is a wasteful number, since it uses less digits than its factorization.

243406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7178.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 243406 is about 493.3619361078. The cubic root of 243406 is about 62.4372490181.

Adding to 243406 its reverse (604342), we get a palindrome (847748).

The spelling of 243406 in words is "two hundred forty-three thousand, four hundred six".