1399239 has 12 divisors (see below), whose sum is σ = 2041416. Its totient is φ = 923472.

The previous prime is 1399231. The next prime is 1399261. The reversal of 1399239 is 9329931.

It is not a de Polignac number, because 1399239 - 2³ = 1399231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237 + ... + 1689.

It is an arithmetic number, because the mean of its divisors is an integer number (170118).

2^1399239 is an apocalyptic number.

1399239 is a deficient number, since it is larger than the sum of its proper divisors (642177).

1399239 is a wasteful number, since it uses less digits than its factorization.

1399239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566 (or 1563 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 1399239 is about 1182.8943317135. The cubic root of 1399239 is about 111.8486209562.

The spelling of 1399239 in words is "one million, three hundred ninety-nine thousand, two hundred thirty-nine".