1155241320 has 32 divisors (see below), whose sum is σ = 3465724320. Its totient is φ = 308064320.

The previous prime is 1155241291. The next prime is 1155241327. The reversal of 1155241320 is 231425511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1155241327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4813386 + ... + 4813625.

It is an arithmetic number, because the mean of its divisors is an integer number (108303885).

Almost surely, 2^1155241320 is an apocalyptic number.

1155241320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155241320 is an abundant number, since it is smaller than the sum of its proper divisors (2310483000).

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

1155241320 is a wasteful number, since it uses less digits than its factorization.

1155241320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9627025 (or 9627021 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1155241320 is about 33988.8411099878. The cubic root of 1155241320 is about 1049.2788154308.

Adding to 1155241320 its reverse (231425511), we get a palindrome (1386666831).

The spelling of 1155241320 in words is "one billion, one hundred fifty-five million, two hundred forty-one thousand, three hundred twenty".