11012561 has 16 divisors (see below), whose sum is σ = 13327104. Its totient is φ = 8895744.

The previous prime is 11012557. The next prime is 11012567. The reversal of 11012561 is 16521011.

It is a cyclic number.

It is not a de Polignac number, because 11012561 - 2² = 11012557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11012567) 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, 11285 + ... + 12221.

It is an arithmetic number, because the mean of its divisors is an integer number (832944).

Almost surely, 2^11012561 is an apocalyptic number.

It is an amenable number.

11012561 is a deficient number, since it is larger than the sum of its proper divisors (2314543).

11012561 is an equidigital number, since it uses as much as digits as its factorization.

11012561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 11012561 is about 3318.5178920717. The cubic root of 11012561 is about 222.4826296249.

Adding to 11012561 its reverse (16521011), we get a palindrome (27533572).

The spelling of 11012561 in words is "eleven million, twelve thousand, five hundred sixty-one".