1155143532 has 48 divisors (see below), whose sum is σ = 2876101760. Its totient is φ = 359779968.

The previous prime is 1155143531. The next prime is 1155143543. The reversal of 1155143532 is 2353415511.

It is a self number, because there is not a number n which added to its sum of digits gives 1155143532.

It is not an unprimeable number, because it can be changed into a prime (1155143531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18058 + ... + 51345.

Almost surely, 2^1155143532 is an apocalyptic number.

1155143532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155143532 is an abundant number, since it is smaller than the sum of its proper divisors (1720958228).

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

1155143532 is a wasteful number, since it uses less digits than its factorization.

1155143532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69502 (or 69500 counting only the distinct ones).

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

The square root of 1155143532 is about 33987.4025485914. The cubic root of 1155143532 is about 1049.2492084069.

The spelling of 1155143532 in words is "one billion, one hundred fifty-five million, one hundred forty-three thousand, five hundred thirty-two".