11161871 has 4 divisors (see below), whose sum is σ = 12756432. Its totient is φ = 9567312.

The previous prime is 11161867. The next prime is 11161879. The reversal of 11161871 is 17816111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17816111 = 1367 ⋅13033.

It is a cyclic number.

It is not a de Polignac number, because 11161871 - 2² = 11161867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11161871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11161879) 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, 797270 + ... + 797283.

It is an arithmetic number, because the mean of its divisors is an integer number (3189108).

Almost surely, 2^11161871 is an apocalyptic number.

11161871 is a deficient number, since it is larger than the sum of its proper divisors (1594561).

11161871 is an equidigital number, since it uses as much as digits as its factorization.

11161871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594560.

The product of its digits is 336, while the sum is 26.

The square root of 11161871 is about 3340.9386405620. The cubic root of 11161871 is about 223.4836039735.

Adding to 11161871 its reverse (17816111), we get a palindrome (28977982).

The spelling of 11161871 in words is "eleven million, one hundred sixty-one thousand, eight hundred seventy-one".