1390039 has 8 divisors (see below), whose sum is σ = 1682208. Its totient is φ = 1121280.

The previous prime is 1390027. The next prime is 1390043. The reversal of 1390039 is 9300931.

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 1390039 - 2⁷ = 1389911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1389995 and 1390022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5722 + ... + 5959.

It is an arithmetic number, because the mean of its divisors is an integer number (210276).

2^1390039 is an apocalyptic number.

1390039 is a deficient number, since it is larger than the sum of its proper divisors (292169).

1390039 is a wasteful number, since it uses less digits than its factorization.

1390039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11705.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 1390039 is about 1178.9991518233. Note that the first 3 decimals coincide. The cubic root of 1390039 is about 111.6029467411.

The spelling of 1390039 in words is "one million, three hundred ninety thousand, thirty-nine".