1155943012 has 48 divisors (see below), whose sum is σ = 2373638400. Its totient is φ = 482514240.

The previous prime is 1155942989. The next prime is 1155943021. The reversal of 1155943012 is 2103495511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1929489 + ... + 1930087.

It is an arithmetic number, because the mean of its divisors is an integer number (49450800).

Almost surely, 2^1155943012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155943012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1186819200).

1155943012 is an abundant number, since it is smaller than the sum of its proper divisors (1217695388).

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

1155943012 is an frugal number, since it uses more digits than its factorization.

1155943012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1155943012 is about 33999.1619308476. The cubic root of 1155943012 is about 1049.4912159392.

The spelling of 1155943012 in words is "one billion, one hundred fifty-five million, nine hundred forty-three thousand, twelve".