12751231 has 2 divisors, whose sum is σ = 12751232. Its totient is φ = 12751230.

The previous prime is 12751201. The next prime is 12751237. The reversal of 12751231 is 13215721.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13215721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12751231 - 2⁹ = 12750719 is a prime.

It is a super-2 number, since 2×12751231² = 325187784030722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12751237) 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 as a sum of consecutive naturals, namely, 6375615 + 6375616.

It is an arithmetic number, because the mean of its divisors is an integer number (6375616).

Almost surely, 2^12751231 is an apocalyptic number.

12751231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12751231 is an equidigital number, since it uses as much as digits as its factorization.

12751231 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12751231 is about 3570.8865845893. The cubic root of 12751231 is about 233.6239546551.

Adding to 12751231 its reverse (13215721), we get a palindrome (25966952).

The spelling of 12751231 in words is "twelve million, seven hundred fifty-one thousand, two hundred thirty-one".