1265729 has 2 divisors, whose sum is σ = 1265730. Its totient is φ = 1265728.

The previous prime is 1265681. The next prime is 1265741. The reversal of 1265729 is 9275621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123600 + 142129 = 1060^2 + 377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265729 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1265695 and 1265704.

It is not a weakly prime, because it can be changed into another prime (1265779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632864 + 632865.

It is an arithmetic number, because the mean of its divisors is an integer number (632865).

2^1265729 is an apocalyptic number.

It is an amenable number.

1265729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265729 is an equidigital number, since it uses as much as digits as its factorization.

1265729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 1265729 is about 1125.0462212727. The cubic root of 1265729 is about 108.1716805355.

The spelling of 1265729 in words is "one million, two hundred sixty-five thousand, seven hundred twenty-nine".