1389635 has 8 divisors (see below), whose sum is σ = 1795920. Its totient is φ = 1026144.

The previous prime is 1389629. The next prime is 1389643. The reversal of 1389635 is 5369831.

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 1389635 - 2²⁰ = 341059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1389595 and 1389604.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10625 + ... + 10754.

It is an arithmetic number, because the mean of its divisors is an integer number (224490).

2^1389635 is an apocalyptic number.

1389635 is a deficient number, since it is larger than the sum of its proper divisors (406285).

1389635 is a wasteful number, since it uses less digits than its factorization.

1389635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21397.

The product of its digits is 19440, while the sum is 35.

The square root of 1389635 is about 1178.8278076123. The cubic root of 1389635 is about 111.5921336250.

It can be divided in two parts, 13896 and 35, that added together give a palindrome (13931).

The spelling of 1389635 in words is "one million, three hundred eighty-nine thousand, six hundred thirty-five".