11036561 has 6 divisors (see below), whose sum is σ = 11251590. Its totient is φ = 10825568.

The previous prime is 11036539. The next prime is 11036569. The reversal of 11036561 is 16563011.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1849600 + 9186961 = 1360^2 + 3031^2 .

It is not a de Polignac number, because 11036561 - 2⁶ = 11036497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11036569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 845 + ... + 4773.

It is an arithmetic number, because the mean of its divisors is an integer number (1875265).

Almost surely, 2^11036561 is an apocalyptic number.

It is an amenable number.

11036561 is a deficient number, since it is larger than the sum of its proper divisors (215029).

11036561 is an frugal number, since it uses more digits than its factorization.

11036561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035 (or 3982 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 11036561 is about 3322.1319961735. The cubic root of 11036561 is about 222.6441333507.

Adding to 11036561 its reverse (16563011), we get a palindrome (27599572).

The spelling of 11036561 in words is "eleven million, thirty-six thousand, five hundred sixty-one".