11878161 has 4 divisors (see below), whose sum is σ = 15837552. Its totient is φ = 7918772.

The previous prime is 11878133. The next prime is 11878171. The reversal of 11878161 is 16187811.

11878161 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11878161 - 2⁷ = 11878033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11878171) 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, 1979691 + ... + 1979696.

It is an arithmetic number, because the mean of its divisors is an integer number (3959388).

Almost surely, 2^11878161 is an apocalyptic number.

It is an amenable number.

11878161 is a deficient number, since it is larger than the sum of its proper divisors (3959391).

11878161 is an equidigital number, since it uses as much as digits as its factorization.

11878161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3959390.

The product of its digits is 2688, while the sum is 33.

The square root of 11878161 is about 3446.4708035902. The cubic root of 11878161 is about 228.1653732509.

The spelling of 11878161 in words is "eleven million, eight hundred seventy-eight thousand, one hundred sixty-one".