1158131712 has 78 divisors (see below), whose sum is σ = 3098065548. Its totient is φ = 384786432.

The previous prime is 1158131701. The next prime is 1158131713. The reversal of 1158131712 is 2171318511.

It is a self number, because there is not a number n which added to its sum of digits gives 1158131712.

It is not an unprimeable number, because it can be changed into a prime (1158131713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3772263 + ... + 3772569.

Almost surely, 2^1158131712 is an apocalyptic number.

1158131712 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 1158131712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1549032774).

1158131712 is an abundant number, since it is smaller than the sum of its proper divisors (1939933836).

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

1158131712 is an frugal number, since it uses more digits than its factorization.

1158131712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 312 counting only the distinct ones).

The product of its digits is 1680, while the sum is 30.

The square root of 1158131712 is about 34031.3342671133. The cubic root of 1158131712 is about 1050.1531785596.

It can be divided in two parts, 1158 and 131712, that added together give a triangular number (132870 = T₅₁₅).

The spelling of 1158131712 in words is "one billion, one hundred fifty-eight million, one hundred thirty-one thousand, seven hundred twelve".