1165729 has 2 divisors, whose sum is σ = 1165730. Its totient is φ = 1165728.

The previous prime is 1165727. The next prime is 1165739. The reversal of 1165729 is 9275611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1151329 + 14400 = 1073^2 + 120^2 .

It is an emirp because it is prime and its reverse (9275611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1165729 - 2¹ = 1165727 is a prime.

Together with 1165727, it forms a pair of twin primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1165729.

It is not a weakly prime, because it can be changed into another prime (1165721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582864 + 582865.

It is an arithmetic number, because the mean of its divisors is an integer number (582865).

2^1165729 is an apocalyptic number.

It is an amenable number.

1165729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165729 is an equidigital number, since it uses as much as digits as its factorization.

1165729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 31.

The square root of 1165729 is about 1079.6893071620. The cubic root of 1165729 is about 105.2444493549.

The spelling of 1165729 in words is "one million, one hundred sixty-five thousand, seven hundred twenty-nine".