1321245839 has 8 divisors (see below), whose sum is σ = 1362787920. Its totient is φ = 1280010816.

The previous prime is 1321245791. The next prime is 1321245859. The reversal of 1321245839 is 9385421231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321245839 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 (1321245859) 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, 68009 + ... + 85250.

It is an arithmetic number, because the mean of its divisors is an integer number (170348490).

Almost surely, 2^1321245839 is an apocalyptic number.

1321245839 is a deficient number, since it is larger than the sum of its proper divisors (41542081).

1321245839 is a wasteful number, since it uses less digits than its factorization.

1321245839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153529.

The product of its digits is 51840, while the sum is 38.

The square root of 1321245839 is about 36348.9455005231. The cubic root of 1321245839 is about 1097.3063123692.

The spelling of 1321245839 in words is "one billion, three hundred twenty-one million, two hundred forty-five thousand, eight hundred thirty-nine".