13243247 has 4 divisors (see below), whose sum is σ = 13940280. Its totient is φ = 12546216.

The previous prime is 13243213. The next prime is 13243253. The reversal of 13243247 is 74234231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13243247 - 2²² = 9048943 is a prime.

It is a super-2 number, since 2×13243247² = 350767182206018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13243297) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 348488 + ... + 348525.

It is an arithmetic number, because the mean of its divisors is an integer number (3485070).

Almost surely, 2^13243247 is an apocalyptic number.

13243247 is a deficient number, since it is larger than the sum of its proper divisors (697033).

13243247 is an equidigital number, since it uses as much as digits as its factorization.

13243247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697032.

The product of its digits is 4032, while the sum is 26.

The square root of 13243247 is about 3639.1272305321. The cubic root of 13243247 is about 236.5909672155.

Adding to 13243247 its reverse (74234231), we get a palindrome (87477478).

The spelling of 13243247 in words is "thirteen million, two hundred forty-three thousand, two hundred forty-seven".