13117247 has 24 divisors (see below), whose sum is σ = 16087680. Its totient is φ = 10612800.

The previous prime is 13117243. The next prime is 13117249. The reversal of 13117247 is 74271131.

It is a happy number.

It is not a de Polignac number, because 13117247 - 2² = 13117243 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 (13117241) 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 23 ways as a sum of consecutive naturals, for example, 48629 + ... + 48897.

It is an arithmetic number, because the mean of its divisors is an integer number (670320).

Almost surely, 2^13117247 is an apocalyptic number.

13117247 is a deficient number, since it is larger than the sum of its proper divisors (2970433).

13117247 is a wasteful number, since it uses less digits than its factorization.

13117247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 324 counting only the distinct ones).

The product of its digits is 1176, while the sum is 26.

The square root of 13117247 is about 3621.7740128285. The cubic root of 13117247 is about 235.8382437959.

Adding to 13117247 its reverse (74271131), we get a palindrome (87388378).

It can be divided in two parts, 1311 and 7247, that added together give a palindrome (8558).

The spelling of 13117247 in words is "thirteen million, one hundred seventeen thousand, two hundred forty-seven".