11155556 has 6 divisors (see below), whose sum is σ = 19522230. Its totient is φ = 5577776.

The previous prime is 11155549. The next prime is 11155561. The reversal of 11155556 is 65555111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 40000 = 3334^2 + 200^2 .

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1394441 + ... + 1394448.

It is an arithmetic number, because the mean of its divisors is an integer number (3253705).

Almost surely, 2^11155556 is an apocalyptic number.

It is an amenable number.

11155556 is a deficient number, since it is larger than the sum of its proper divisors (8366674).

11155556 is a wasteful number, since it uses less digits than its factorization.

11155556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788893 (or 2788891 counting only the distinct ones).

The product of its digits is 3750, while the sum is 29.

The square root of 11155556 is about 3339.9934131672. The cubic root of 11155556 is about 223.4414495952.

It can be divided in two parts, 11155 and 556, that added together give a palindrome (11711).

The spelling of 11155556 in words is "eleven million, one hundred fifty-five thousand, five hundred fifty-six".