1244205939 has 16 divisors (see below), whose sum is σ = 1680747264. Its totient is φ = 818589600.

The previous prime is 1244205901. The next prime is 1244205947. The reversal of 1244205939 is 9395024421.

It is not a de Polignac number, because 1244205939 - 2⁷ = 1244205811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1244205897 and 1244205906.

It is not an unprimeable number, because it can be changed into a prime (1244206939) 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, 291954 + ... + 296184.

It is an arithmetic number, because the mean of its divisors is an integer number (105046704).

Almost surely, 2^1244205939 is an apocalyptic number.

1244205939 is a deficient number, since it is larger than the sum of its proper divisors (436541325).

1244205939 is a wasteful number, since it uses less digits than its factorization.

1244205939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1244205939 is about 35273.3034886159. The cubic root of 1244205939 is about 1075.5503766171.

The spelling of 1244205939 in words is "one billion, two hundred forty-four million, two hundred five thousand, nine hundred thirty-nine".