11409556 has 6 divisors (see below), whose sum is σ = 19966730. Its totient is φ = 5704776.

The previous prime is 11409551. The next prime is 11409569. The reversal of 11409556 is 65590411.

It can be written as a sum of positive squares in only one way, i.e., 9821956 + 1587600 = 3134^2 + 1260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11409551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1426191 + ... + 1426198.

Almost surely, 2^11409556 is an apocalyptic number.

It is an amenable number.

11409556 is a deficient number, since it is larger than the sum of its proper divisors (8557174).

11409556 is a wasteful number, since it uses less digits than its factorization.

11409556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852393 (or 2852391 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 11409556 is about 3377.8034282652. The cubic root of 11409556 is about 225.1245795689.

Adding to 11409556 its reverse (65590411), we get a palindrome (76999967).

The spelling of 11409556 in words is "eleven million, four hundred nine thousand, five hundred fifty-six".