1155505271 has 8 divisors (see below), whose sum is σ = 1170796800. Its totient is φ = 1140230520.

The previous prime is 1155505243. The next prime is 1155505289. The reversal of 1155505271 is 1725055511.

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 1155505271 - 2²² = 1151310967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155505291) 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 7 ways as a sum of consecutive naturals, for example, 197060 + ... + 202838.

It is an arithmetic number, because the mean of its divisors is an integer number (146349600).

Almost surely, 2^1155505271 is an apocalyptic number.

1155505271 is a deficient number, since it is larger than the sum of its proper divisors (15291529).

1155505271 is an equidigital number, since it uses as much as digits as its factorization.

1155505271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8389.

The product of its (nonzero) digits is 8750, while the sum is 32.

The square root of 1155505271 is about 33992.7237949535. The cubic root of 1155505271 is about 1049.3587228629.

The spelling of 1155505271 in words is "one billion, one hundred fifty-five million, five hundred five thousand, two hundred seventy-one".