1243116326 has 16 divisors (see below), whose sum is σ = 1918604688. Its totient is φ = 603741600.

The previous prime is 1243116307. The next prime is 1243116331. The reversal of 1243116326 is 6236113421.

It is a Curzon number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 24365 + ... + 55496.

It is an arithmetic number, because the mean of its divisors is an integer number (119912793).

Almost surely, 2^1243116326 is an apocalyptic number.

1243116326 is a deficient number, since it is larger than the sum of its proper divisors (675488362).

1243116326 is a wasteful number, since it uses less digits than its factorization.

1243116326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80087.

The product of its digits is 5184, while the sum is 29.

The square root of 1243116326 is about 35257.8548127931. The cubic root of 1243116326 is about 1075.2363139395.

Adding to 1243116326 its reverse (6236113421), we get a palindrome (7479229747).

The spelling of 1243116326 in words is "one billion, two hundred forty-three million, one hundred sixteen thousand, three hundred twenty-six".