11145556 has 6 divisors (see below), whose sum is σ = 19504730. Its totient is φ = 5572776.

The previous prime is 11145551. The next prime is 11145569. The reversal of 11145556 is 65554111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 1285956 = 3140^2 + 1134^2 .

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11145551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1393191 + ... + 1393198.

Almost surely, 2^11145556 is an apocalyptic number.

It is an amenable number.

11145556 is a deficient number, since it is larger than the sum of its proper divisors (8359174).

11145556 is a wasteful number, since it uses less digits than its factorization.

11145556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786393 (or 2786391 counting only the distinct ones).

The product of its digits is 3000, while the sum is 28.

The square root of 11145556 is about 3338.4960685914. The cubic root of 11145556 is about 223.3746642647.

Adding to 11145556 its reverse (65554111), we get a palindrome (76699667).

It can be divided in two parts, 1114 and 5556, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 11145556 in words is "eleven million, one hundred forty-five thousand, five hundred fifty-six".