1161081 has 8 divisors (see below), whose sum is σ = 1720160. Its totient is φ = 774036.

The previous prime is 1161077. The next prime is 1161091. The reversal of 1161081 is 1801611.

It is not a de Polignac number, because 1161081 - 2² = 1161077 is a prime.

It is a super-2 number, since 2×1161081² = 2696218177122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

1161081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1161001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21475 + ... + 21528.

It is an arithmetic number, because the mean of its divisors is an integer number (215020).

2^1161081 is an apocalyptic number.

It is an amenable number.

1161081 is a deficient number, since it is larger than the sum of its proper divisors (559079).

1161081 is an equidigital number, since it uses as much as digits as its factorization.

1161081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43012 (or 43006 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 1161081 is about 1077.5346862166. The cubic root of 1161081 is about 105.1043859860.

Adding to 1161081 its reverse (1801611), we get a palindrome (2962692).

The spelling of 1161081 in words is "one million, one hundred sixty-one thousand, eighty-one".