1065115620 has 72 divisors (see below), whose sum is σ = 3420910584. Its totient is φ = 267322368.

The previous prime is 1065115531. The next prime is 1065115643. The reversal of 1065115620 is 265115601.

It is a happy number.

1065115620 is a `hidden beast` number, since 1 + 0 + 651 + 1 + 5 + 6 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 552908196 + 512207424 = 23514^2 + 22632^2 .

It is a super-2 number, since 2×1065115620² = 2268942567935968800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 170979 + ... + 177098.

It is an arithmetic number, because the mean of its divisors is an integer number (47512647).

Almost surely, 2^1065115620 is an apocalyptic number.

1065115620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1065115620 is an abundant number, since it is smaller than the sum of its proper divisors (2355794964).

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

1065115620 is a wasteful number, since it uses less digits than its factorization.

1065115620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348109 (or 348104 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1065115620 is about 32636.1091430949. The cubic root of 1065115620 is about 1021.2504272478.

The spelling of 1065115620 in words is "one billion, sixty-five million, one hundred fifteen thousand, six hundred twenty".