11127161 has 4 divisors (see below), whose sum is σ = 11241972. Its totient is φ = 11012352.

The previous prime is 11127139. The next prime is 11127169. The reversal of 11127161 is 16172111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7398400 + 3728761 = 2720^2 + 1931^2 .

It is a cyclic number.

It is not a de Polignac number, because 11127161 - 2²² = 6932857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11127169) 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 3 ways as a sum of consecutive naturals, for example, 57260 + ... + 57453.

It is an arithmetic number, because the mean of its divisors is an integer number (2810493).

Almost surely, 2^11127161 is an apocalyptic number.

It is an amenable number.

11127161 is a deficient number, since it is larger than the sum of its proper divisors (114811).

11127161 is an equidigital number, since it uses as much as digits as its factorization.

11127161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114810.

The product of its digits is 84, while the sum is 20.

The square root of 11127161 is about 3335.7399478976. The cubic root of 11127161 is about 223.2517082466.

Adding to 11127161 its reverse (16172111), we get a palindrome (27299272).

It can be divided in two parts, 111 and 27161, that added together give a palindrome (27272).

The spelling of 11127161 in words is "eleven million, one hundred twenty-seven thousand, one hundred sixty-one".