1165789 has 2 divisors, whose sum is σ = 1165790. Its totient is φ = 1165788.

The previous prime is 1165777. The next prime is 1165799. The reversal of 1165789 is 9875611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 840889 + 324900 = 917^2 + 570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1165789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582894 + 582895.

It is an arithmetic number, because the mean of its divisors is an integer number (582895).

2^1165789 is an apocalyptic number.

It is an amenable number.

1165789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165789 is an equidigital number, since it uses as much as digits as its factorization.

1165789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 37.

The square root of 1165789 is about 1079.7170925756. The cubic root of 1165789 is about 105.2462549657.

The spelling of 1165789 in words is "one million, one hundred sixty-five thousand, seven hundred eighty-nine".