12751213 has 4 divisors (see below), whose sum is σ = 13190940. Its totient is φ = 12311488.

The previous prime is 12751201. The next prime is 12751231. The reversal of 12751213 is 31215721.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8838729 + 3912484 = 2973^2 + 1978^2 .

It is a cyclic number.

It is not a de Polignac number, because 12751213 - 2⁹ = 12750701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12751253) 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, 219820 + ... + 219877.

It is an arithmetic number, because the mean of its divisors is an integer number (3297735).

Almost surely, 2^12751213 is an apocalyptic number.

It is an amenable number.

12751213 is a deficient number, since it is larger than the sum of its proper divisors (439727).

12751213 is an equidigital number, since it uses as much as digits as its factorization.

12751213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439726.

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

The square root of 12751213 is about 3570.8840642059. The cubic root of 12751213 is about 233.6238447250.

Adding to 12751213 its reverse (31215721), we get a palindrome (43966934).

The spelling of 12751213 in words is "twelve million, seven hundred fifty-one thousand, two hundred thirteen".