11123656 has 8 divisors (see below), whose sum is σ = 20856870. Its totient is φ = 5561824.

The previous prime is 11123647. The next prime is 11123657. The reversal of 11123656 is 65632111.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 8100 = 3334^2 + 90^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 11123656.

It is not an unprimeable number, because it can be changed into a prime (11123657) 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 as a sum of consecutive naturals, namely, 695221 + ... + 695236.

Almost surely, 2^11123656 is an apocalyptic number.

It is an amenable number.

11123656 is a deficient number, since it is larger than the sum of its proper divisors (9733214).

11123656 is a wasteful number, since it uses less digits than its factorization.

11123656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390463 (or 1390459 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 11123656 is about 3335.2145358282. The cubic root of 11123656 is about 223.2282647282.

Adding to 11123656 its reverse (65632111), we get a palindrome (76755767).

The spelling of 11123656 in words is "eleven million, one hundred twenty-three thousand, six hundred fifty-six".