1161323275 has 18 divisors (see below), whose sum is σ = 1675151340. Its totient is φ = 796335120.

The previous prime is 1161323257. The next prime is 1161323281. The reversal of 1161323275 is 5723231611.

It is a happy number.

It is not a de Polignac number, because 1161323275 - 2⁵ = 1161323243 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 472785 + ... + 475234.

Almost surely, 2^1161323275 is an apocalyptic number.

1161323275 is a deficient number, since it is larger than the sum of its proper divisors (513828065).

1161323275 is an equidigital number, since it uses as much as digits as its factorization.

1161323275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948043 (or 948031 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 1161323275 is about 34078.1935407380. The cubic root of 1161323275 is about 1051.1169595377.

Adding to 1161323275 its reverse (5723231611), we get a palindrome (6884554886).

The spelling of 1161323275 in words is "one billion, one hundred sixty-one million, three hundred twenty-three thousand, two hundred seventy-five".