1155123132 has 12 divisors (see below), whose sum is σ = 2695287336. Its totient is φ = 385041040.

The previous prime is 1155123103. The next prime is 1155123133. The reversal of 1155123132 is 2313215511.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155123133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48130119 + ... + 48130142.

It is an arithmetic number, because the mean of its divisors is an integer number (224607278).

Almost surely, 2^1155123132 is an apocalyptic number.

1155123132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155123132 is an abundant number, since it is smaller than the sum of its proper divisors (1540164204).

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

1155123132 is a wasteful number, since it uses less digits than its factorization.

1155123132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96260268 (or 96260266 counting only the distinct ones).

The product of its digits is 900, while the sum is 24.

The square root of 1155123132 is about 33987.1024360712. The cubic root of 1155123132 is about 1049.2430317402.

Adding to 1155123132 its reverse (2313215511), we get a palindrome (3468338643).

The spelling of 1155123132 in words is "one billion, one hundred fifty-five million, one hundred twenty-three thousand, one hundred thirty-two".