12751691 has 2 divisors, whose sum is σ = 12751692. Its totient is φ = 12751690.

The previous prime is 12751681. The next prime is 12751727. The reversal of 12751691 is 19615721.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12751691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12751601) 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 as a sum of consecutive naturals, namely, 6375845 + 6375846.

It is an arithmetic number, because the mean of its divisors is an integer number (6375846).

Almost surely, 2^12751691 is an apocalyptic number.

12751691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12751691 is an equidigital number, since it uses as much as digits as its factorization.

12751691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 32.

The square root of 12751691 is about 3570.9509937830. The cubic root of 12751691 is about 233.6267639454.

The spelling of 12751691 in words is "twelve million, seven hundred fifty-one thousand, six hundred ninety-one".