1155134321 has 8 divisors (see below), whose sum is σ = 1267432704. Its totient is φ = 1044050320.

The previous prime is 1155134263. The next prime is 1155134347. The reversal of 1155134321 is 1234315511.

1155134321 = 4151² + 4152² + ... + 4216².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1155134321 - 2¹⁰ = 1155133297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1155134371) 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 7 ways as a sum of consecutive naturals, for example, 301601 + ... + 305406.

It is an arithmetic number, because the mean of its divisors is an integer number (158429088).

Almost surely, 2^1155134321 is an apocalyptic number.

1155134321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1155134321 is a deficient number, since it is larger than the sum of its proper divisors (112298383).

1155134321 is a wasteful number, since it uses less digits than its factorization.

1155134321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607191.

The product of its digits is 1800, while the sum is 26.

The square root of 1155134321 is about 33987.2670422322. The cubic root of 1155134321 is about 1049.2464195298.

Adding to 1155134321 its reverse (1234315511), we get a palindrome (2389449832).

The spelling of 1155134321 in words is "one billion, one hundred fifty-five million, one hundred thirty-four thousand, three hundred twenty-one".