11123147 has 8 divisors (see below), whose sum is σ = 12972000. Its totient is φ = 9533832.

The previous prime is 11123143. The next prime is 11123171. The reversal of 11123147 is 74132111.

It is a happy number.

It is not a de Polignac number, because 11123147 - 2² = 11123143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11123143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15872 + ... + 16557.

It is an arithmetic number, because the mean of its divisors is an integer number (1621500).

Almost surely, 2^11123147 is an apocalyptic number.

11123147 is a deficient number, since it is larger than the sum of its proper divisors (1848853).

11123147 is an frugal number, since it uses more digits than its factorization.

11123147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32450 (or 32436 counting only the distinct ones).

The product of its digits is 168, while the sum is 20.

The square root of 11123147 is about 3335.1382280199. The cubic root of 11123147 is about 223.2248598249.

Adding to 11123147 its reverse (74132111), we get a palindrome (85255258).

The spelling of 11123147 in words is "eleven million, one hundred twenty-three thousand, one hundred forty-seven".