1399559 has 16 divisors (see below), whose sum is σ = 1785600. Its totient is φ = 1067904.

The previous prime is 1399553. The next prime is 1399577. The reversal of 1399559 is 9559931.

1399559 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It is a cyclic number.

It is not a de Polignac number, because 1399559 - 2⁴ = 1399543 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1952 + ... + 2570.

It is an arithmetic number, because the mean of its divisors is an integer number (111600).

2^1399559 is an apocalyptic number.

1399559 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1399559 is a deficient number, since it is larger than the sum of its proper divisors (386041).

1399559 is a wasteful number, since it uses less digits than its factorization.

1399559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662.

The product of its digits is 54675, while the sum is 41.

The square root of 1399559 is about 1183.0295854289. The cubic root of 1399559 is about 111.8571467407.

The spelling of 1399559 in words is "one million, three hundred ninety-nine thousand, five hundred fifty-nine".