1159665120 has 192 divisors, whose sum is σ = 4076110080. Its totient is φ = 307929600.

The previous prime is 1159665113. The next prime is 1159665121. The reversal of 1159665120 is 215669511.

1159665120 is a `hidden beast` number, since 1 + 1 + 596 + 65 + 1 + 2 + 0 = 666.

It is a super-2 number, since 2×1159665120² = 2689646381089228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159665121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1429515 + ... + 1430325.

It is an arithmetic number, because the mean of its divisors is an integer number (21229740).

Almost surely, 2^1159665120 is an apocalyptic number.

1159665120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1159665120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2038055040).

1159665120 is an abundant number, since it is smaller than the sum of its proper divisors (2916444960).

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

1159665120 is a wasteful number, since it uses less digits than its factorization.

1159665120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166 (or 1152 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 1159665120 is about 34053.8561693092. The cubic root of 1159665120 is about 1050.6164543358.

The spelling of 1159665120 in words is "one billion, one hundred fifty-nine million, six hundred sixty-five thousand, one hundred twenty".