1161160261 has 8 divisors (see below), whose sum is σ = 1229136480. Its totient is φ = 1095046512.

The previous prime is 1161160241. The next prime is 1161160277. The reversal of 1161160261 is 1620611611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161160261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161160241) 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, 464335 + ... + 466828.

It is an arithmetic number, because the mean of its divisors is an integer number (153642060).

Almost surely, 2^1161160261 is an apocalyptic number.

It is an amenable number.

1161160261 is a deficient number, since it is larger than the sum of its proper divisors (67976219).

1161160261 is an equidigital number, since it uses as much as digits as its factorization.

1161160261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931235.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1161160261 is about 34075.8016926968. The cubic root of 1161160261 is about 1051.0677757598.

Adding to 1161160261 its reverse (1620611611), we get a palindrome (2781771872).

The spelling of 1161160261 in words is "one billion, one hundred sixty-one million, one hundred sixty thousand, two hundred sixty-one".