1165823 has 2 divisors, whose sum is σ = 1165824. Its totient is φ = 1165822.

The previous prime is 1165819. The next prime is 1165831. The reversal of 1165823 is 3285611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1165823 - 2² = 1165819 is a prime.

It is a Sophie Germain prime.

It is equal to p₉₀₄₆₇ and since 1165823 and 90467 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1165792 and 1165801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582911 + 582912.

It is an arithmetic number, because the mean of its divisors is an integer number (582912).

2^1165823 is an apocalyptic number.

1165823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165823 is an equidigital number, since it uses as much as digits as its factorization.

1165823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 1165823 is about 1079.7328373260. The cubic root of 1165823 is about 105.2472781177.

The spelling of 1165823 in words is "one million, one hundred sixty-five thousand, eight hundred twenty-three".