1244113985 has 8 divisors (see below), whose sum is σ = 1499345640. Its totient is φ = 991018624.

The previous prime is 1244113973. The next prime is 1244113993. The reversal of 1244113985 is 5893114421.

It is a Cunningham number, because it is equal to 35272²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 1244113984 = 1^2 + 35272^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1244113985 - 2²⁴ = 1227336769 is a prime.

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, 532790 + ... + 535119.

It is an arithmetic number, because the mean of its divisors is an integer number (187418205).

Almost surely, 2^1244113985 is an apocalyptic number.

It is an amenable number.

1244113985 is a deficient number, since it is larger than the sum of its proper divisors (255231655).

1244113985 is a wasteful number, since it uses less digits than its factorization.

1244113985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068147.

The product of its digits is 34560, while the sum is 38.

The square root of 1244113985 is about 35272.0000141756. Note that the first 4 decimals coincide. The cubic root of 1244113985 is about 1075.5238795041.

The spelling of 1244113985 in words is "one billion, two hundred forty-four million, one hundred thirteen thousand, nine hundred eighty-five".