12571247 has 4 divisors (see below), whose sum is σ = 13538280. Its totient is φ = 11604216.

The previous prime is 12571241. The next prime is 12571261. The reversal of 12571247 is 74217521.

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

It is not a de Polignac number, because 12571247 - 2⁶ = 12571183 is a prime.

It is a super-2 number, since 2×12571247² = 316072502270018, 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 (12571241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483497 + ... + 483522.

It is an arithmetic number, because the mean of its divisors is an integer number (3384570).

Almost surely, 2^12571247 is an apocalyptic number.

12571247 is a deficient number, since it is larger than the sum of its proper divisors (967033).

12571247 is an equidigital number, since it uses as much as digits as its factorization.

12571247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967032.

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

The square root of 12571247 is about 3545.5954365945. The cubic root of 12571247 is about 232.5195389599.

Adding to 12571247 its reverse (74217521), we get a palindrome (86788768).

The spelling of 12571247 in words is "twelve million, five hundred seventy-one thousand, two hundred forty-seven".