11662161 has 16 divisors (see below), whose sum is σ = 17885184. Its totient is φ = 6621264.

The previous prime is 11662151. The next prime is 11662171. The reversal of 11662161 is 16126611.

It is an interprime number because it is at equal distance from previous prime (11662151) and next prime (11662171).

It is not a de Polignac number, because 11662161 - 2⁶ = 11662097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11662151) 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 15 ways as a sum of consecutive naturals, for example, 1720 + ... + 5126.

It is an arithmetic number, because the mean of its divisors is an integer number (1117824).

Almost surely, 2^11662161 is an apocalyptic number.

It is an amenable number.

11662161 is a deficient number, since it is larger than the sum of its proper divisors (6223023).

11662161 is a wasteful number, since it uses less digits than its factorization.

11662161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580.

The product of its digits is 432, while the sum is 24.

The square root of 11662161 is about 3414.9906295625. The cubic root of 11662161 is about 226.7738696571.

Adding to 11662161 its reverse (16126611), we get a palindrome (27788772).

The spelling of 11662161 in words is "eleven million, six hundred sixty-two thousand, one hundred sixty-one".