1165023 has 20 divisors (see below), whose sum is σ = 1834360. Its totient is φ = 734832.

The previous prime is 1165001. The next prime is 1165037. The reversal of 1165023 is 3205611.

1165023 is a `hidden beast` number, since 11 + 650 + 2 + 3 = 666.

It is not a de Polignac number, because 1165023 - 2⁵ = 1164991 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1164987 and 1165005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1161 + ... + 1917.

It is an arithmetic number, because the mean of its divisors is an integer number (91718).

2^1165023 is an apocalyptic number.

1165023 is a deficient number, since it is larger than the sum of its proper divisors (669337).

1165023 is an equidigital number, since it uses as much as digits as its factorization.

1165023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1165023 is about 1079.3623117378. The cubic root of 1165023 is about 105.2231986794.

The spelling of 1165023 in words is "one million, one hundred sixty-five thousand, twenty-three".