13143247 has 8 divisors (see below), whose sum is σ = 14500080. Its totient is φ = 11835840.

The previous prime is 13143241. The next prime is 13143257. The reversal of 13143247 is 74234131.

13143247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13143247 - 2³ = 13143239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11797 + ... + 12862.

It is an arithmetic number, because the mean of its divisors is an integer number (1812510).

Almost surely, 2^13143247 is an apocalyptic number.

13143247 is a deficient number, since it is larger than the sum of its proper divisors (1356833).

13143247 is a wasteful number, since it uses less digits than its factorization.

13143247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24713.

The product of its digits is 2016, while the sum is 25.

The square root of 13143247 is about 3625.3616371336. The cubic root of 13143247 is about 235.9939611114.

Adding to 13143247 its reverse (74234131), we get a palindrome (87377378).

The spelling of 13143247 in words is "thirteen million, one hundred forty-three thousand, two hundred forty-seven".