1399259 has 4 divisors (see below), whose sum is σ = 1408800. Its totient is φ = 1389720.

The previous prime is 1399231. The next prime is 1399261. The reversal of 1399259 is 9529931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9529931 = 73 ⋅130547.

It is a cyclic number.

It is not a de Polignac number, because 1399259 - 2⁸ = 1399003 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 (1396259) 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 3 ways as a sum of consecutive naturals, for example, 4547 + ... + 4844.

It is an arithmetic number, because the mean of its divisors is an integer number (352200).

2^1399259 is an apocalyptic number.

1399259 is a deficient number, since it is larger than the sum of its proper divisors (9541).

1399259 is an equidigital number, since it uses as much as digits as its factorization.

1399259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9540.

The product of its digits is 21870, while the sum is 38.

The square root of 1399259 is about 1182.9027855238. The cubic root of 1399259 is about 111.8491538558.

It can be divided in two parts, 13992 and 59, that multiplied together give a palindrome (825528).

The spelling of 1399259 in words is "one million, three hundred ninety-nine thousand, two hundred fifty-nine".