1397439 has 16 divisors (see below), whose sum is σ = 2101600. Its totient is φ = 917568.

The previous prime is 1397437. The next prime is 1397441. The reversal of 1397439 is 9347931.

It is an interprime number because it is at equal distance from previous prime (1397437) and next prime (1397441).

It is not a de Polignac number, because 1397439 - 2¹ = 1397437 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 (1397437) 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 15 ways as a sum of consecutive naturals, for example, 1617 + ... + 2325.

It is an arithmetic number, because the mean of its divisors is an integer number (131350).

2^1397439 is an apocalyptic number.

1397439 is a deficient number, since it is larger than the sum of its proper divisors (704161).

1397439 is an equidigital number, since it uses as much as digits as its factorization.

1397439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791 (or 785 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 1397439 is about 1182.1332412211. The cubic root of 1397439 is about 111.8006391819.

The spelling of 1397439 in words is "one million, three hundred ninety-seven thousand, four hundred thirty-nine".