1171912720 has 40 divisors (see below), whose sum is σ = 2972399040. Its totient is φ = 426149760.

The previous prime is 1171912691. The next prime is 1171912739. The reversal of 1171912720 is 272191711.

1171912720 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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, 664980 + ... + 666739.

It is an arithmetic number, because the mean of its divisors is an integer number (74309976).

Almost surely, 2^1171912720 is an apocalyptic number.

1171912720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1171912720 is an abundant number, since it is smaller than the sum of its proper divisors (1800486320).

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

1171912720 is a wasteful number, since it uses less digits than its factorization.

1171912720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331743 (or 1331737 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 31.

The square root of 1171912720 is about 34233.2107755028. The cubic root of 1171912720 is about 1054.3021432499.

It can be divided in two parts, 117191 and 2720, that added together give a palindrome (119911).

The spelling of 1171912720 in words is "one billion, one hundred seventy-one million, nine hundred twelve thousand, seven hundred twenty".