1392439 has 4 divisors (see below), whose sum is σ = 1394920. Its totient is φ = 1389960.

The previous prime is 1392431. The next prime is 1392449. The reversal of 1392439 is 9342931.

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 1392439 - 2³ = 1392431 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1392439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392431) 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, 49 + ... + 1669.

It is an arithmetic number, because the mean of its divisors is an integer number (348730).

2^1392439 is an apocalyptic number.

1392439 is a deficient number, since it is larger than the sum of its proper divisors (2481).

1392439 is an equidigital number, since it uses as much as digits as its factorization.

1392439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480.

The product of its digits is 5832, while the sum is 31.

The square root of 1392439 is about 1180.0165253080. The cubic root of 1392439 is about 111.6671399203.

The spelling of 1392439 in words is "one million, three hundred ninety-two thousand, four hundred thirty-nine".