247243 has 4 divisors (see below), whose sum is σ = 248248. Its totient is φ = 246240.

The previous prime is 247241. The next prime is 247249. The reversal of 247243 is 342742.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 247243 - 2¹ = 247241 is a prime.

It is a super-2 number, since 2×247243² = 122258202098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247241) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 148 + ... + 718.

It is an arithmetic number, because the mean of its divisors is an integer number (62062).

2²⁴⁷²⁴³ is an apocalyptic number.

247243 is a deficient number, since it is larger than the sum of its proper divisors (1005).

247243 is an equidigital number, since it uses as much as digits as its factorization.

247243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004.

The product of its digits is 1344, while the sum is 22.

The square root of 247243 is about 497.2353567477. The cubic root of 247243 is about 62.7636224876.

Adding to 247243 its reverse (342742), we get a palindrome (589985).

The spelling of 247243 in words is "two hundred forty-seven thousand, two hundred forty-three", and thus it is an iban number.