1171165120 has 56 divisors (see below), whose sum is σ = 2878823808. Its totient is φ = 453350400.

The previous prime is 1171165117. The next prime is 1171165133. The reversal of 1171165120 is 215611711.

It is a super-2 number, since 2×1171165120² = 2743255476609228800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49111 + ... + 68950.

It is an arithmetic number, because the mean of its divisors is an integer number (51407568).

Almost surely, 2^1171165120 is an apocalyptic number.

1171165120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1171165120 is an abundant number, since it is smaller than the sum of its proper divisors (1707658688).

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

1171165120 is a wasteful number, since it uses less digits than its factorization.

1171165120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118109 (or 118099 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 25.

The square root of 1171165120 is about 34222.2898123431. The cubic root of 1171165120 is about 1054.0779047227.

Adding to 1171165120 its reverse (215611711), we get a palindrome (1386776831).

The spelling of 1171165120 in words is "one billion, one hundred seventy-one million, one hundred sixty-five thousand, one hundred twenty".