1155321245 has 16 divisors (see below), whose sum is σ = 1494554880. Its totient is φ = 852289344.

The previous prime is 1155321229. The next prime is 1155321269. The reversal of 1155321245 is 5421235511.

It is a cyclic number.

It is not a de Polignac number, because 1155321245 - 2⁴ = 1155321229 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 58982 + ... + 76088.

It is an arithmetic number, because the mean of its divisors is an integer number (93409680).

Almost surely, 2^1155321245 is an apocalyptic number.

It is an amenable number.

1155321245 is a deficient number, since it is larger than the sum of its proper divisors (339233635).

1155321245 is a wasteful number, since it uses less digits than its factorization.

1155321245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18164.

The product of its digits is 6000, while the sum is 29.

The square root of 1155321245 is about 33990.0168431850. The cubic root of 1155321245 is about 1049.3030128788.

Adding to 1155321245 its reverse (5421235511), we get a palindrome (6576556756).

The spelling of 1155321245 in words is "one billion, one hundred fifty-five million, three hundred twenty-one thousand, two hundred forty-five".