1165316020 has 24 divisors (see below), whose sum is σ = 2669633568. Its totient is φ = 423751200.

The previous prime is 1165315997. The next prime is 1165316023. The reversal of 1165316020 is 206135611.

It is a super-2 number, since 2×1165316020² = 2715922852937280800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165316023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2648226 + ... + 2648665.

It is an arithmetic number, because the mean of its divisors is an integer number (111234732).

Almost surely, 2^1165316020 is an apocalyptic number.

1165316020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165316020 is an abundant number, since it is smaller than the sum of its proper divisors (1504317548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165316020 is a wasteful number, since it uses less digits than its factorization.

1165316020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5296911 (or 5296909 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1165316020 is about 34136.7253848403. The cubic root of 1165316020 is about 1052.3201965463.

The spelling of 1165316020 in words is "one billion, one hundred sixty-five million, three hundred sixteen thousand, twenty".