1161320266 has 8 divisors (see below), whose sum is σ = 1742312484. Its totient is φ = 580549440.

The previous prime is 1161320263. The next prime is 1161320267. The reversal of 1161320266 is 6620231611.

It can be written as a sum of positive squares in 2 ways, for example, as 1083792241 + 77528025 = 32921^2 + 8805^2 .

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 (1161320263) 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, 41545 + ... + 63628.

Almost surely, 2^1161320266 is an apocalyptic number.

1161320266 is a deficient number, since it is larger than the sum of its proper divisors (580992218).

1161320266 is a wasteful number, since it uses less digits than its factorization.

1161320266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110696.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1161320266 is about 34078.1493922425. The cubic root of 1161320266 is about 1051.1160517188.

Adding to 1161320266 its reverse (6620231611), we get a palindrome (7781551877).

The spelling of 1161320266 in words is "one billion, one hundred sixty-one million, three hundred twenty thousand, two hundred sixty-six".