1155320545 has 8 divisors (see below), whose sum is σ = 1389211200. Its totient is φ = 922372080.

The previous prime is 1155320533. The next prime is 1155320549. The reversal of 1155320545 is 5450235511.

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

It is not a de Polignac number, because 1155320545 - 2⁷ = 1155320417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155320549) 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, 232845 + ... + 237754.

It is an arithmetic number, because the mean of its divisors is an integer number (173651400).

Almost surely, 2^1155320545 is an apocalyptic number.

It is an amenable number.

1155320545 is a deficient number, since it is larger than the sum of its proper divisors (233890655).

1155320545 is an equidigital number, since it uses as much as digits as its factorization.

1155320545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471095.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1155320545 is about 33990.0065460423. The cubic root of 1155320545 is about 1049.3028009573.

The spelling of 1155320545 in words is "one billion, one hundred fifty-five million, three hundred twenty thousand, five hundred forty-five".