1120385565 has 48 divisors (see below), whose sum is σ = 2163535920. Its totient is φ = 532546560.

The previous prime is 1120385549. The next prime is 1120385569. The reversal of 1120385565 is 5655830211.

It is a happy number.

1120385565 is a `hidden beast` number, since 1 + 12 + 0 + 3 + 85 + 565 = 666.

1120385565 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 84382596 + 1036002969 = 9186^2 + 32187^2 .

It is not a de Polignac number, because 1120385565 - 2⁴ = 1120385549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120385569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16056 + ... + 49985.

It is an arithmetic number, because the mean of its divisors is an integer number (45073665).

Almost surely, 2^1120385565 is an apocalyptic number.

1120385565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1120385565 is a deficient number, since it is larger than the sum of its proper divisors (1043150355).

1120385565 is a wasteful number, since it uses less digits than its factorization.

1120385565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66094 (or 66091 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 1120385565 is about 33472.1610446652. The cubic root of 1120385565 is about 1038.6179759830.

The spelling of 1120385565 in words is "one billion, one hundred twenty million, three hundred eighty-five thousand, five hundred sixty-five".