1392389 has 4 divisors (see below), whose sum is σ = 1399200. Its totient is φ = 1385580.

The previous prime is 1392379. The next prime is 1392407. The reversal of 1392389 is 9832931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9832931 = 53 ⋅185527.

It is a cyclic number.

It is not a de Polignac number, because 1392389 - 2⁴ = 1392373 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 (1392379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3089 + ... + 3510.

It is an arithmetic number, because the mean of its divisors is an integer number (349800).

2^1392389 is an apocalyptic number.

It is an amenable number.

1392389 is a deficient number, since it is larger than the sum of its proper divisors (6811).

1392389 is an equidigital number, since it uses as much as digits as its factorization.

1392389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810.

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

The square root of 1392389 is about 1179.9953389738. The cubic root of 1392389 is about 111.6658033150.

The spelling of 1392389 in words is "one million, three hundred ninety-two thousand, three hundred eighty-nine".