1161265133 has 8 divisors (see below), whose sum is σ = 1328141952. Its totient is φ = 994633776.

The previous prime is 1161265129. The next prime is 1161265153. The reversal of 1161265133 is 3315621611.

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 1161265133 - 2² = 1161265129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1161265096 and 1161265105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161265103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51110 + ... + 70247.

It is an arithmetic number, because the mean of its divisors is an integer number (166017744).

Almost surely, 2^1161265133 is an apocalyptic number.

It is an amenable number.

1161265133 is a deficient number, since it is larger than the sum of its proper divisors (166876819).

1161265133 is a wasteful number, since it uses less digits than its factorization.

1161265133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122731.

The product of its digits is 3240, while the sum is 29.

The square root of 1161265133 is about 34077.3404625420. The cubic root of 1161265133 is about 1051.0994177491.

Adding to 1161265133 its reverse (3315621611), we get a palindrome (4476886744).

The spelling of 1161265133 in words is "one billion, one hundred sixty-one million, two hundred sixty-five thousand, one hundred thirty-three".