1155534132 has 72 divisors (see below), whose sum is σ = 2893413600. Its totient is φ = 358822400.

The previous prime is 1155534113. The next prime is 1155534139. The reversal of 1155534132 is 2314355511.

It is a self number, because there is not a number n which added to its sum of digits gives 1155534132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155534139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 348619 + ... + 351917.

It is an arithmetic number, because the mean of its divisors is an integer number (40186300).

Almost surely, 2^1155534132 is an apocalyptic number.

1155534132 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 1155534132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446706800).

1155534132 is an abundant number, since it is smaller than the sum of its proper divisors (1737879468).

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

1155534132 is a wasteful number, since it uses less digits than its factorization.

1155534132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441 (or 3422 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

The square root of 1155534132 is about 33993.1483096226. The cubic root of 1155534132 is about 1049.3674593844.

Adding to 1155534132 its reverse (2314355511), we get a palindrome (3469889643).

The spelling of 1155534132 in words is "one billion, one hundred fifty-five million, five hundred thirty-four thousand, one hundred thirty-two".