1243011116 has 12 divisors (see below), whose sum is σ = 2176584480. Its totient is φ = 621129840.

The previous prime is 1243011089. The next prime is 1243011139. The reversal of 1243011116 is 6111103421.

It is a happy number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 86420 + ... + 99771.

It is an arithmetic number, because the mean of its divisors is an integer number (181382040).

Almost surely, 2^1243011116 is an apocalyptic number.

It is an amenable number.

1243011116 is a deficient number, since it is larger than the sum of its proper divisors (933573364).

1243011116 is a wasteful number, since it uses less digits than its factorization.

1243011116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187864 (or 187862 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1243011116 is about 35256.3627732641. The cubic root of 1243011116 is about 1075.2059792069.

Adding to 1243011116 its reverse (6111103421), we get a palindrome (7354114537).

The spelling of 1243011116 in words is "one billion, two hundred forty-three million, eleven thousand, one hundred sixteen".