11810161 has 4 divisors (see below), whose sum is σ = 12883824. Its totient is φ = 10736500.

The previous prime is 11810147. The next prime is 11810167. The reversal of 11810161 is 16101811.

11810161 is digitally balanced in base 2, 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 11810161 - 2¹¹ = 11808113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11810167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536815 + ... + 536836.

It is an arithmetic number, because the mean of its divisors is an integer number (3220956).

Almost surely, 2^11810161 is an apocalyptic number.

11810161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11810161 is a deficient number, since it is larger than the sum of its proper divisors (1073663).

11810161 is a wasteful number, since it uses less digits than its factorization.

11810161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073662.

The product of its (nonzero) digits is 48, while the sum is 19.

The square root of 11810161 is about 3436.5914799406. The cubic root of 11810161 is about 227.7291399797.

Adding to 11810161 its reverse (16101811), we get a palindrome (27911972).

The spelling of 11810161 in words is "eleven million, eight hundred ten thousand, one hundred sixty-one".