11651161 has 4 divisors (see below), whose sum is σ = 12264400. Its totient is φ = 11037924.

The previous prime is 11651147. The next prime is 11651173. The reversal of 11651161 is 16115611.

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 11651161 - 2⁷ = 11651033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11651111) 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 3 ways as a sum of consecutive naturals, for example, 306591 + ... + 306628.

It is an arithmetic number, because the mean of its divisors is an integer number (3066100).

Almost surely, 2^11651161 is an apocalyptic number.

It is an amenable number.

11651161 is a deficient number, since it is larger than the sum of its proper divisors (613239).

11651161 is an equidigital number, since it uses as much as digits as its factorization.

11651161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613238.

The product of its digits is 180, while the sum is 22.

The square root of 11651161 is about 3413.3797034611. The cubic root of 11651161 is about 226.7025479049.

Adding to 11651161 its reverse (16115611), we get a palindrome (27766772).

The spelling of 11651161 in words is "eleven million, six hundred fifty-one thousand, one hundred sixty-one".