11641161 has 16 divisors (see below), whose sum is σ = 17792384. Its totient is φ = 6632064.

The previous prime is 11641153. The next prime is 11641177. The reversal of 11641161 is 16114611.

It is not a de Polignac number, because 11641161 - 2³ = 11641153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11641121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8991 + ... + 10203.

It is an arithmetic number, because the mean of its divisors is an integer number (1112024).

Almost surely, 2^11641161 is an apocalyptic number.

It is an amenable number.

11641161 is a deficient number, since it is larger than the sum of its proper divisors (6151223).

11641161 is a wasteful number, since it uses less digits than its factorization.

11641161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680.

The product of its digits is 144, while the sum is 21.

The square root of 11641161 is about 3411.9145651672. The cubic root of 11641161 is about 226.6376709834.

Adding to 11641161 its reverse (16114611), we get a palindrome (27755772).

The spelling of 11641161 in words is "eleven million, six hundred forty-one thousand, one hundred sixty-one".