1161273266 has 8 divisors (see below), whose sum is σ = 1817645184. Its totient is φ = 555391540.

The previous prime is 1161273263. The next prime is 1161273277. The reversal of 1161273266 is 6623721611.

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

It is not an unprimeable number, because it can be changed into a prime (1161273263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12622490 + ... + 12622581.

It is an arithmetic number, because the mean of its divisors is an integer number (227205648).

Almost surely, 2^1161273266 is an apocalyptic number.

1161273266 is a deficient number, since it is larger than the sum of its proper divisors (656371918).

1161273266 is a wasteful number, since it uses less digits than its factorization.

1161273266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25245096.

The product of its digits is 18144, while the sum is 35.

The square root of 1161273266 is about 34077.4597938285. The cubic root of 1161273266 is about 1051.1018715590.

Adding to 1161273266 its reverse (6623721611), we get a palindrome (7784994877).

The spelling of 1161273266 in words is "one billion, one hundred sixty-one million, two hundred seventy-three thousand, two hundred sixty-six".