1392489 has 36 divisors (see below), whose sum is σ = 2478528. Its totient is φ = 736560.

The previous prime is 1392481. The next prime is 1392497. The reversal of 1392489 is 9842931.

It is an interprime number because it is at equal distance from previous prime (1392481) and next prime (1392497).

It is not a de Polignac number, because 1392489 - 2³ = 1392481 is a prime.

Its product of digits (15552) is a multiple of the sum of its prime divisors (64).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392481) 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 35 ways as a sum of consecutive naturals, for example, 44904 + ... + 44934.

It is an arithmetic number, because the mean of its divisors is an integer number (68848).

2^1392489 is an apocalyptic number.

It is an amenable number.

1392489 is a deficient number, since it is larger than the sum of its proper divisors (1086039).

1392489 is a wasteful number, since it uses less digits than its factorization.

1392489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 64 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1392489 is about 1180.0377112618. The cubic root of 1392489 is about 111.6684764935.

Adding to 1392489 its product of digits (15552), we get a palindrome (1408041).

It can be divided in two parts, 1392 and 489, that added together give a palindrome (1881).

The spelling of 1392489 in words is "one million, three hundred ninety-two thousand, four hundred eighty-nine".