1244052839 has 4 divisors (see below), whose sum is σ = 1256878224. Its totient is φ = 1231227456.

The previous prime is 1244052829. The next prime is 1244052853. The reversal of 1244052839 is 9382504421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9382504421 = 181 ⋅51837041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244052839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244052829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6412547 + ... + 6412740.

It is an arithmetic number, because the mean of its divisors is an integer number (314219556).

Almost surely, 2^1244052839 is an apocalyptic number.

1244052839 is a deficient number, since it is larger than the sum of its proper divisors (12825385).

1244052839 is an equidigital number, since it uses as much as digits as its factorization.

1244052839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12825384.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1244052839 is about 35271.1332253445. The cubic root of 1244052839 is about 1075.5062591839.

The spelling of 1244052839 in words is "one billion, two hundred forty-four million, fifty-two thousand, eight hundred thirty-nine".