1191356112 has 40 divisors (see below), whose sum is σ = 3083641920. Its totient is φ = 396348160.

The previous prime is 1191356099. The next prime is 1191356113. The reversal of 1191356112 is 2116531911.

It is a self number, because there is not a number n which added to its sum of digits gives 1191356112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191356113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189 + ... + 48827.

It is an arithmetic number, because the mean of its divisors is an integer number (77091048).

Almost surely, 2^1191356112 is an apocalyptic number.

1191356112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1191356112 is an abundant number, since it is smaller than the sum of its proper divisors (1892285808).

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

1191356112 is a wasteful number, since it uses less digits than its factorization.

1191356112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48171 (or 48165 counting only the distinct ones).

The product of its digits is 1620, while the sum is 30.

The square root of 1191356112 is about 34516.0268860713. The cubic root of 1191356112 is about 1060.1008898868.

The spelling of 1191356112 in words is "one billion, one hundred ninety-one million, three hundred fifty-six thousand, one hundred twelve".