1389385 has 8 divisors (see below), whose sum is σ = 1675080. Its totient is φ = 1106304.

The previous prime is 1389383. The next prime is 1389403. The reversal of 1389385 is 5839831.

It can be written as a sum of positive squares in 4 ways, for example, as 170569 + 1218816 = 413^2 + 1104^2 .

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 1389385 - 2¹ = 1389383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1389383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829 + ... + 1861.

It is an arithmetic number, because the mean of its divisors is an integer number (209385).

2^1389385 is an apocalyptic number.

It is an amenable number.

1389385 is a deficient number, since it is larger than the sum of its proper divisors (285695).

1389385 is a wasteful number, since it uses less digits than its factorization.

1389385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307.

The product of its digits is 25920, while the sum is 37.

The square root of 1389385 is about 1178.7217653034. The cubic root of 1389385 is about 111.5854412906.

It can be divided in two parts, 13 and 89385, that added together give a palindrome (89398).

The spelling of 1389385 in words is "one million, three hundred eighty-nine thousand, three hundred eighty-five".