1116520561 has 8 divisors (see below), whose sum is σ = 1243869480. Its totient is φ = 995094912.

The previous prime is 1116520529. The next prime is 1116520567. The reversal of 1116520561 is 1650256111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 97634161 + 1018886400 = 9881^2 + 31920^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1116520561 - 2⁵ = 1116520529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1116520567) 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 7 ways as a sum of consecutive naturals, for example, 1480420 + ... + 1481173.

It is an arithmetic number, because the mean of its divisors is an integer number (155483685).

Almost surely, 2^1116520561 is an apocalyptic number.

It is an amenable number.

1116520561 is a deficient number, since it is larger than the sum of its proper divisors (127348919).

1116520561 is a wasteful number, since it uses less digits than its factorization.

1116520561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961635.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1116520561 is about 33414.3765615940. The cubic root of 1116520561 is about 1037.4222901297.

Adding to 1116520561 its reverse (1650256111), we get a palindrome (2766776672).

The spelling of 1116520561 in words is "one billion, one hundred sixteen million, five hundred twenty thousand, five hundred sixty-one".