11123861 has 4 divisors (see below), whose sum is σ = 12712992. Its totient is φ = 9534732.

The previous prime is 11123857. The next prime is 11123869. The reversal of 11123861 is 16832111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16832111 = 53 ⋅317587.

It is a cyclic number.

It is not a de Polignac number, because 11123861 - 2² = 11123857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123869) 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, 794555 + ... + 794568.

It is an arithmetic number, because the mean of its divisors is an integer number (3178248).

Almost surely, 2^11123861 is an apocalyptic number.

It is an amenable number.

11123861 is a deficient number, since it is larger than the sum of its proper divisors (1589131).

11123861 is an equidigital number, since it uses as much as digits as its factorization.

11123861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589130.

The product of its digits is 288, while the sum is 23.

The square root of 11123861 is about 3335.2452683423. The cubic root of 11123861 is about 223.2296360253.

Adding to 11123861 its reverse (16832111), we get a palindrome (27955972).

The spelling of 11123861 in words is "eleven million, one hundred twenty-three thousand, eight hundred sixty-one".