13071247 has 4 divisors (see below), whose sum is σ = 14938576. Its totient is φ = 11203920.

The previous prime is 13071241. The next prime is 13071281. The reversal of 13071247 is 74217031.

It is a happy number.

13071247 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-13071247 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 (13071241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933654 + ... + 933667.

It is an arithmetic number, because the mean of its divisors is an integer number (3734644).

Almost surely, 2^13071247 is an apocalyptic number.

13071247 is a deficient number, since it is larger than the sum of its proper divisors (1867329).

13071247 is an equidigital number, since it uses as much as digits as its factorization.

13071247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867328.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 13071247 is about 3615.4179564747. The cubic root of 13071247 is about 235.5622390991.

Adding to 13071247 its reverse (74217031), we get a palindrome (87288278).

The spelling of 13071247 in words is "thirteen million, seventy-one thousand, two hundred forty-seven".