1155523259 has 12 divisors (see below), whose sum is σ = 1271929008. Its totient is φ = 1048980240.

The previous prime is 1155523249. The next prime is 1155523301. The reversal of 1155523259 is 9523255511.

It is not a de Polignac number, because 1155523259 - 2¹² = 1155519163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155523249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83477 + ... + 96329.

It is an arithmetic number, because the mean of its divisors is an integer number (105994084).

Almost surely, 2^1155523259 is an apocalyptic number.

1155523259 is a deficient number, since it is larger than the sum of its proper divisors (116405749).

1155523259 is a wasteful number, since it uses less digits than its factorization.

1155523259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13618 (or 13607 counting only the distinct ones).

The product of its digits is 67500, while the sum is 38.

The square root of 1155523259 is about 33992.9883799586. The cubic root of 1155523259 is about 1049.3641680326.

It can be divided in two parts, 115552 and 3259, that added together give a palindrome (118811).

The spelling of 1155523259 in words is "one billion, one hundred fifty-five million, five hundred twenty-three thousand, two hundred fifty-nine".