243412 has 24 divisors (see below), whose sum is σ = 476672. Its totient is φ = 108000.

The previous prime is 243403. The next prime is 243421. The reversal of 243412 is 214342.

It is an interprime number because it is at equal distance from previous prime (243403) and next prime (243421).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

243412 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1537 + ... + 1687.

2²⁴³⁴¹² is an apocalyptic number.

243412 is the 403-rd pentagonal number.

It is an amenable number.

243412 is a deficient number, since it is larger than the sum of its proper divisors (233260).

243412 is a wasteful number, since it uses less digits than its factorization.

243412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 197 counting only the distinct ones).

The product of its digits is 192, while the sum is 16.

The square root of 243412 is about 493.3680167988. The cubic root of 243412 is about 62.4377620436.

Adding to 243412 its reverse (214342), we get a palindrome (457754).

The spelling of 243412 in words is "two hundred forty-three thousand, four hundred twelve", and thus it is an iban number.