1399839 has 16 divisors (see below), whose sum is σ = 2150400. Its totient is φ = 793440.

The previous prime is 1399837. The next prime is 1399843. The reversal of 1399839 is 9389931.

It is a happy number.

It is not a de Polignac number, because 1399839 - 2¹ = 1399837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1399839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3837 + ... + 4185.

It is an arithmetic number, because the mean of its divisors is an integer number (134400).

2^1399839 is an apocalyptic number.

1399839 is a deficient number, since it is larger than the sum of its proper divisors (750561).

1399839 is a wasteful number, since it uses less digits than its factorization.

1399839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550.

The product of its digits is 52488, while the sum is 42.

The square root of 1399839 is about 1183.1479197463. The cubic root of 1399839 is about 111.8646057361.

The spelling of 1399839 in words is "one million, three hundred ninety-nine thousand, eight hundred thirty-nine".