11000561 has 16 divisors (see below), whose sum is σ = 13231680. Its totient is φ = 9011520.

The previous prime is 11000537. The next prime is 11000569. The reversal of 11000561 is 16500011.

It is a cyclic number.

It is not a de Polignac number, because 11000561 - 2²² = 6806257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11000569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5255 + ... + 7043.

It is an arithmetic number, because the mean of its divisors is an integer number (826980).

Almost surely, 2^11000561 is an apocalyptic number.

11000561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11000561 is a deficient number, since it is larger than the sum of its proper divisors (2231119).

11000561 is a wasteful number, since it uses less digits than its factorization.

11000561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 11000561 is about 3316.7093632093. The cubic root of 11000561 is about 222.4017897588.

Adding to 11000561 its reverse (16500011), we get a palindrome (27500572).

The spelling of 11000561 in words is "eleven million, five hundred sixty-one", and thus it is an aban number.