243415 has 8 divisors (see below), whose sum is σ = 295920. Its totient is φ = 192192.

The previous prime is 243403. The next prime is 243421. The reversal of 243415 is 514342.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243415 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243392 and 243401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172 + ... + 718.

It is an arithmetic number, because the mean of its divisors is an integer number (36990).

2²⁴³⁴¹⁵ is an apocalyptic number.

243415 is a deficient number, since it is larger than the sum of its proper divisors (52505).

243415 is an equidigital number, since it uses as much as digits as its factorization.

243415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641.

The product of its digits is 480, while the sum is 19.

The square root of 243415 is about 493.3710571162. The cubic root of 243415 is about 62.4380185531.

Adding to 243415 its reverse (514342), we get a palindrome (757757).

The spelling of 243415 in words is "two hundred forty-three thousand, four hundred fifteen".