1165129956 has 27 divisors (see below), whose sum is σ = 2945707401. Its totient is φ = 388308384.

The previous prime is 1165129949. The next prime is 1165129957. The reversal of 1165129956 is 6599215611.

It is a happy number.

The square root of 1165129956 is 34134.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1113289956 + 51840000 = 33366^2 + 7200^2 .

It is not an unprimeable number, because it can be changed into a prime (1165129957) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 201960 + ... + 207648.

Almost surely, 2^1165129956 is an apocalyptic number.

1165129956 is the 34134-th square number.

It is an amenable number.

1165129956 is an abundant number, since it is smaller than the sum of its proper divisors (1780577445).

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

1165129956 is an frugal number, since it uses more digits than its factorization.

1165129956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11388 (or 5694 counting only the distinct ones).

The product of its digits is 145800, while the sum is 45.

The cubic root of 1165129956 is about 1052.2641861813.

The spelling of 1165129956 in words is "one billion, one hundred sixty-five million, one hundred twenty-nine thousand, nine hundred fifty-six".