1105500561 has 32 divisors (see below), whose sum is σ = 1680739200. Its totient is φ = 640174080.

The previous prime is 1105500491. The next prime is 1105500593. The reversal of 1105500561 is 1650055011.

It is not a de Polignac number, because 1105500561 - 2⁷ = 1105500433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1105500661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86875 + ... + 98783.

It is an arithmetic number, because the mean of its divisors is an integer number (52523100).

Almost surely, 2^1105500561 is an apocalyptic number.

1105500561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1105500561 is a deficient number, since it is larger than the sum of its proper divisors (575238639).

1105500561 is a wasteful number, since it uses less digits than its factorization.

1105500561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12049.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1105500561 is about 33249.0685734202. The cubic root of 1105500561 is about 1033.9978977144.

Adding to 1105500561 its reverse (1650055011), we get a palindrome (2755555572).

The spelling of 1105500561 in words is "one billion, one hundred five million, five hundred thousand, five hundred sixty-one".