11885161 has 4 divisors (see below), whose sum is σ = 11972052. Its totient is φ = 11798272.

The previous prime is 11885147. The next prime is 11885171. The reversal of 11885161 is 16158811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16158811 = 23 ⋅702557.

It can be written as a sum of positive squares in 2 ways, for example, as 6451600 + 5433561 = 2540^2 + 2331^2 .

It is a cyclic number.

It is not a de Polignac number, because 11885161 - 2⁵ = 11885129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11885171) 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 3 ways as a sum of consecutive naturals, for example, 43240 + ... + 43513.

It is an arithmetic number, because the mean of its divisors is an integer number (2993013).

Almost surely, 2^11885161 is an apocalyptic number.

It is an amenable number.

11885161 is a deficient number, since it is larger than the sum of its proper divisors (86891).

11885161 is an equidigital number, since it uses as much as digits as its factorization.

11885161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86890.

The product of its digits is 1920, while the sum is 31.

The square root of 11885161 is about 3447.4861856141. The cubic root of 11885161 is about 228.2101850130.

The spelling of 11885161 in words is "eleven million, eight hundred eighty-five thousand, one hundred sixty-one".