12757609 has 2 divisors, whose sum is σ = 12757610. Its totient is φ = 12757608.

The previous prime is 12757603. The next prime is 12757621. The reversal of 12757609 is 90675721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12581209 + 176400 = 3547^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 12757609 - 2⁹ = 12757097 is a prime.

It is not a weakly prime, because it can be changed into another prime (12757603) 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, 6378804 + 6378805.

It is an arithmetic number, because the mean of its divisors is an integer number (6378805).

Almost surely, 2^12757609 is an apocalyptic number.

It is an amenable number.

12757609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12757609 is an equidigital number, since it uses as much as digits as its factorization.

12757609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 12757609 is about 3571.7795284704. The cubic root of 12757609 is about 233.6629000510.

It can be divided in two parts, 12757 and 609, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 12757609 in words is "twelve million, seven hundred fifty-seven thousand, six hundred nine".