12565129 has 2 divisors, whose sum is σ = 12565130. Its totient is φ = 12565128.

The previous prime is 12565123. The next prime is 12565139. The reversal of 12565129 is 92156521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 419904 = 3485^2 + 648^2 .

It is a cyclic number.

It is not a de Polignac number, because 12565129 - 2⁵ = 12565097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12565129.

It is not a weakly prime, because it can be changed into another prime (12565123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282564 + 6282565.

It is an arithmetic number, because the mean of its divisors is an integer number (6282565).

Almost surely, 2^12565129 is an apocalyptic number.

It is an amenable number.

12565129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12565129 is an equidigital number, since it uses as much as digits as its factorization.

12565129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 12565129 is about 3544.7325710129. The cubic root of 12565129 is about 232.4818130453.

It can be divided in two parts, 1256512 and 9, that added together give a palindrome (1256521).

The spelling of 12565129 in words is "twelve million, five hundred sixty-five thousand, one hundred twenty-nine".