11123549 has 4 divisors (see below), whose sum is σ = 11211264. Its totient is φ = 11035836.

The previous prime is 11123527. The next prime is 11123551. The reversal of 11123549 is 94532111.

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: 94532111 = 79 ⋅1196609.

It is a cyclic number.

It is not a de Polignac number, because 11123549 - 2¹⁶ = 11058013 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 (11123509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43667 + ... + 43920.

It is an arithmetic number, because the mean of its divisors is an integer number (2802816).

Almost surely, 2^11123549 is an apocalyptic number.

It is an amenable number.

11123549 is a deficient number, since it is larger than the sum of its proper divisors (87715).

11123549 is an equidigital number, since it uses as much as digits as its factorization.

11123549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87714.

The product of its digits is 1080, while the sum is 26.

The square root of 11123549 is about 3335.1984948425. The cubic root of 11123549 is about 223.2275489713.

The spelling of 11123549 in words is "eleven million, one hundred twenty-three thousand, five hundred forty-nine".