11823161 has 12 divisors (see below), whose sum is σ = 13895460. Its totient is φ = 10029600.

The previous prime is 11823139. The next prime is 11823169. The reversal of 11823161 is 16132811.

It can be written as a sum of positive squares in 2 ways, for example, as 7645225 + 4177936 = 2765^2 + 2044^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11823161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11823169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3755 + ... + 6143.

It is an arithmetic number, because the mean of its divisors is an integer number (1157955).

Almost surely, 2^11823161 is an apocalyptic number.

It is an amenable number.

11823161 is a deficient number, since it is larger than the sum of its proper divisors (2072299).

11823161 is a wasteful number, since it uses less digits than its factorization.

11823161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504 (or 2497 counting only the distinct ones).

The product of its digits is 288, while the sum is 23.

The square root of 11823161 is about 3438.4823687202. The cubic root of 11823161 is about 227.8126667337.

Adding to 11823161 its reverse (16132811), we get a palindrome (27955972).

The spelling of 11823161 in words is "eleven million, eight hundred twenty-three thousand, one hundred sixty-one".