1243111560 has 64 divisors (see below), whose sum is σ = 3758745600. Its totient is φ = 328882176.

The previous prime is 1243111549. The next prime is 1243111561. The reversal of 1243111560 is 651113421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1243111560.

It is not an unprimeable number, because it can be changed into a prime (1243111561) 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, 25545 + ... + 56024.

It is an arithmetic number, because the mean of its divisors is an integer number (58730400).

Almost surely, 2^1243111560 is an apocalyptic number.

1243111560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243111560 is an abundant number, since it is smaller than the sum of its proper divisors (2515634040).

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

1243111560 is a wasteful number, since it uses less digits than its factorization.

1243111560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81710 (or 81706 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1243111560 is about 35257.7872249522. The cubic root of 1243111560 is about 1075.2349398169.

Adding to 1243111560 its reverse (651113421), we get a palindrome (1894224981).

The spelling of 1243111560 in words is "one billion, two hundred forty-three million, one hundred eleven thousand, five hundred sixty".