12717231 has 4 divisors (see below), whose sum is σ = 16956312. Its totient is φ = 8478152.

The previous prime is 12717227. The next prime is 12717239. The reversal of 12717231 is 13271721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13271721 = 3 ⋅4423907.

It is a cyclic number.

It is not a de Polignac number, because 12717231 - 2² = 12717227 is a prime.

It is a super-2 number, since 2×12717231² = 323455928614722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12717239) 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, 2119536 + ... + 2119541.

It is an arithmetic number, because the mean of its divisors is an integer number (4239078).

Almost surely, 2^12717231 is an apocalyptic number.

12717231 is a deficient number, since it is larger than the sum of its proper divisors (4239081).

12717231 is an equidigital number, since it uses as much as digits as its factorization.

12717231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239080.

The product of its digits is 588, while the sum is 24.

The square root of 12717231 is about 3566.1226843730. The cubic root of 12717231 is about 233.4161241356.

Adding to 12717231 its reverse (13271721), we get a palindrome (25988952).

The spelling of 12717231 in words is "twelve million, seven hundred seventeen thousand, two hundred thirty-one".