1321113439 has 8 divisors (see below), whose sum is σ = 1360144800. Its totient is φ = 1282406400.

The previous prime is 1321113421. The next prime is 1321113449. The reversal of 1321113439 is 9343111231.

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 1321113439 - 2¹⁷ = 1320982367 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 (1321113449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72802 + ... + 89119.

It is an arithmetic number, because the mean of its divisors is an integer number (170018100).

Almost surely, 2^1321113439 is an apocalyptic number.

1321113439 is a deficient number, since it is larger than the sum of its proper divisors (39031361).

1321113439 is a wasteful number, since it uses less digits than its factorization.

1321113439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162161.

The product of its digits is 1944, while the sum is 28.

The square root of 1321113439 is about 36347.1242191181. The cubic root of 1321113439 is about 1097.2696580226.

The spelling of 1321113439 in words is "one billion, three hundred twenty-one million, one hundred thirteen thousand, four hundred thirty-nine".