12715231 has 4 divisors (see below), whose sum is σ = 12744000. Its totient is φ = 12686464.

The previous prime is 12715211. The next prime is 12715249. The reversal of 12715231 is 13251721.

It is a happy number.

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 12715231 - 2⁷ = 12715103 is a prime.

It is a super-2 number, since 2×12715231² = 323354198766722, 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 (12715211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13711 + ... + 14608.

It is an arithmetic number, because the mean of its divisors is an integer number (3186000).

Almost surely, 2^12715231 is an apocalyptic number.

12715231 is a deficient number, since it is larger than the sum of its proper divisors (28769).

12715231 is an equidigital number, since it uses as much as digits as its factorization.

12715231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28768.

The product of its digits is 420, while the sum is 22.

The square root of 12715231 is about 3565.8422567466. The cubic root of 12715231 is about 233.4038872809.

Adding to 12715231 its reverse (13251721), we get a palindrome (25966952).

The spelling of 12715231 in words is "twelve million, seven hundred fifteen thousand, two hundred thirty-one".