1111122560 has 64 divisors (see below), whose sum is σ = 2660492520. Its totient is φ = 443744256.

The previous prime is 1111122521. The next prime is 1111122563. The reversal of 1111122560 is 652211111.

It can be written as a sum of positive squares in 4 ways, for example, as 1069028416 + 42094144 = 32696^2 + 6488^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1111122563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624392 + ... + 626168.

Almost surely, 2^1111122560 is an apocalyptic number.

1111122560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111122560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330246260).

1111122560 is an abundant number, since it is smaller than the sum of its proper divisors (1549369960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111122560 is an equidigital number, since it uses as much as digits as its factorization.

1111122560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773 (or 2761 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 1111122560 is about 33333.5050662243. The cubic root of 1111122560 is about 1035.7477260750.

Adding to 1111122560 its reverse (652211111), we get a palindrome (1763333671).

The spelling of 1111122560 in words is "one billion, one hundred eleven million, one hundred twenty-two thousand, five hundred sixty".