11005641 has 12 divisors (see below), whose sum is σ = 15970032. Its totient is φ = 7303416.

The previous prime is 11005637. The next prime is 11005649. The reversal of 11005641 is 14650011.

11005641 is a `hidden beast` number, since 1 + 100 + 564 + 1 = 666.

It is not a de Polignac number, because 11005641 - 2² = 11005637 is a prime.

It is a super-2 number, since 2×11005641² = 242248267641762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11005649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 651 + ... + 4736.

It is an arithmetic number, because the mean of its divisors is an integer number (1330836).

Almost surely, 2^11005641 is an apocalyptic number.

It is an amenable number.

11005641 is a deficient number, since it is larger than the sum of its proper divisors (4964391).

11005641 is a wasteful number, since it uses less digits than its factorization.

11005641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5620 (or 5617 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 11005641 is about 3317.4750941039. The cubic root of 11005641 is about 222.4360191411.

Adding to 11005641 its reverse (14650011), we get a palindrome (25655652).

The spelling of 11005641 in words is "eleven million, five thousand, six hundred forty-one".