1191272712 has 192 divisors, whose sum is σ = 3667991040. Its totient is φ = 320947200.

The previous prime is 1191272707. The next prime is 1191272737. The reversal of 1191272712 is 2172721911.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1494298 + ... + 1495094.

It is an arithmetic number, because the mean of its divisors is an integer number (19104120).

Almost surely, 2^1191272712 is an apocalyptic number.

1191272712 is a gapful number since it is divisible by the number (12) 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 1191272712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1833995520).

1191272712 is an abundant number, since it is smaller than the sum of its proper divisors (2476718328).

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

1191272712 is a wasteful number, since it uses less digits than its factorization.

1191272712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 881 counting only the distinct ones).

The product of its digits is 3528, while the sum is 33.

The square root of 1191272712 is about 34514.8187305105. The cubic root of 1191272712 is about 1060.0761521177.

The spelling of 1191272712 in words is "one billion, one hundred ninety-one million, two hundred seventy-two thousand, seven hundred twelve".