1172732120 has 128 divisors (see below), whose sum is σ = 3105907200. Its totient is φ = 390168576.

The previous prime is 1172732111. The next prime is 1172732159. The reversal of 1172732120 is 212372711.

It is a self number, because there is not a number n which added to its sum of digits gives 1172732120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3094091 + ... + 3094469.

It is an arithmetic number, because the mean of its divisors is an integer number (24264900).

Almost surely, 2^1172732120 is an apocalyptic number.

1172732120 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 1172732120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552953600).

1172732120 is an abundant number, since it is smaller than the sum of its proper divisors (1933175080).

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

1172732120 is a wasteful number, since it uses less digits than its factorization.

1172732120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 1172732120 is about 34245.1765946680. The cubic root of 1172732120 is about 1054.5478082767.

The spelling of 1172732120 in words is "one billion, one hundred seventy-two million, seven hundred thirty-two thousand, one hundred twenty".