1161273306 has 8 divisors (see below), whose sum is σ = 2322546624. Its totient is φ = 387091100.

The previous prime is 1161273277. The next prime is 1161273307. The reversal of 1161273306 is 6033721611.

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

1161273306 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1161273307) 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 3 ways as a sum of consecutive naturals, for example, 96772770 + ... + 96772781.

It is an arithmetic number, because the mean of its divisors is an integer number (290318328).

Almost surely, 2^1161273306 is an apocalyptic number.

1161273306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161273306 is a wasteful number, since it uses less digits than its factorization.

1161273306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193545556.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 1161273306 is about 34077.4603807267. The cubic root of 1161273306 is about 1051.1018836273.

Adding to 1161273306 its reverse (6033721611), we get a palindrome (7194994917).

The spelling of 1161273306 in words is "one billion, one hundred sixty-one million, two hundred seventy-three thousand, three hundred six".