1392839 has 4 divisors (see below), whose sum is σ = 1591824. Its totient is φ = 1193856.

The previous prime is 1392829. The next prime is 1392847. The reversal of 1392839 is 9382931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1392839 - 2¹² = 1388743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1392799 and 1392808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99482 + ... + 99495.

It is an arithmetic number, because the mean of its divisors is an integer number (397956).

2^1392839 is an apocalyptic number.

1392839 is a deficient number, since it is larger than the sum of its proper divisors (198985).

1392839 is an equidigital number, since it uses as much as digits as its factorization.

1392839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198984.

The product of its digits is 11664, while the sum is 35.

The square root of 1392839 is about 1180.1860022895. The cubic root of 1392839 is about 111.6778316106.

The spelling of 1392839 in words is "one million, three hundred ninety-two thousand, eight hundred thirty-nine".