1388859 has 4 divisors (see below), whose sum is σ = 1851816. Its totient is φ = 925904.

The previous prime is 1388837. The next prime is 1388873. The reversal of 1388859 is 9588831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1388859 - 2⁸ = 1388603 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388859.

It is not an unprimeable number, because it can be changed into a prime (1388819) 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 3 ways as a sum of consecutive naturals, for example, 231474 + ... + 231479.

It is an arithmetic number, because the mean of its divisors is an integer number (462954).

2^1388859 is an apocalyptic number.

1388859 is a deficient number, since it is larger than the sum of its proper divisors (462957).

1388859 is an equidigital number, since it uses as much as digits as its factorization.

1388859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462956.

The product of its digits is 69120, while the sum is 42.

The square root of 1388859 is about 1178.4986211277. The cubic root of 1388859 is about 111.5713579970.

The spelling of 1388859 in words is "one million, three hundred eighty-eight thousand, eight hundred fifty-nine".