11162161 has 4 divisors (see below), whose sum is σ = 11169652. Its totient is φ = 11154672.

The previous prime is 11162159. The next prime is 11162167. The reversal of 11162161 is 16126111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16126111 = 1663 ⋅9697.

It can be written as a sum of positive squares in 2 ways, for example, as 6031936 + 5130225 = 2456^2 + 2265^2 .

It is a cyclic number.

It is not a de Polignac number, because 11162161 - 2¹ = 11162159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11162167) 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, 666 + ... + 4771.

It is an arithmetic number, because the mean of its divisors is an integer number (2792413).

Almost surely, 2^11162161 is an apocalyptic number.

It is an amenable number.

11162161 is a deficient number, since it is larger than the sum of its proper divisors (7491).

11162161 is an equidigital number, since it uses as much as digits as its factorization.

11162161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7490.

The product of its digits is 72, while the sum is 19.

The square root of 11162161 is about 3340.9820412567. The cubic root of 11162161 is about 223.4855394221.

Adding to 11162161 its reverse (16126111), we get a palindrome (27288272).

The spelling of 11162161 in words is "eleven million, one hundred sixty-two thousand, one hundred sixty-one".