1389005 has 8 divisors (see below), whose sum is σ = 1687392. Its totient is φ = 1097488.

The previous prime is 1389001. The next prime is 1389007. The reversal of 1389005 is 5009831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1389005 - 2² = 1389001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389001) 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 7 ways as a sum of consecutive naturals, for example, 1259 + ... + 2088.

It is an arithmetic number, because the mean of its divisors is an integer number (210924).

2^1389005 is an apocalyptic number.

It is an amenable number.

1389005 is a deficient number, since it is larger than the sum of its proper divisors (298387).

1389005 is an equidigital number, since it uses as much as digits as its factorization.

1389005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3435.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1389005 is about 1178.5605627205. The cubic root of 1389005 is about 111.5752674045.

The spelling of 1389005 in words is "one million, three hundred eighty-nine thousand, five".