12517247 has 4 divisors (see below), whose sum is σ = 12615936. Its totient is φ = 12418560.

The previous prime is 12517243. The next prime is 12517249. The reversal of 12517247 is 74271521.

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 12517247 - 2² = 12517243 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 (12517243) 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, 49154 + ... + 49407.

It is an arithmetic number, because the mean of its divisors is an integer number (3153984).

Almost surely, 2^12517247 is an apocalyptic number.

12517247 is a deficient number, since it is larger than the sum of its proper divisors (98689).

12517247 is an equidigital number, since it uses as much as digits as its factorization.

12517247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98688.

The product of its digits is 3920, while the sum is 29.

The square root of 12517247 is about 3537.9721593026. The cubic root of 12517247 is about 232.1861306041.

Adding to 12517247 its reverse (74271521), we get a palindrome (86788768).

The spelling of 12517247 in words is "twelve million, five hundred seventeen thousand, two hundred forty-seven".