1385665 has 8 divisors (see below), whose sum is σ = 1669248. Its totient is φ = 1104240.

The previous prime is 1385647. The next prime is 1385693. The reversal of 1385665 is 5665831.

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

It is not a de Polignac number, because 1385665 - 2¹⁷ = 1254593 is a prime.

It is a Duffinian number.

1385665 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1385665.

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, 1834 + ... + 2476.

It is an arithmetic number, because the mean of its divisors is an integer number (208656).

2^1385665 is an apocalyptic number.

It is an amenable number.

1385665 is a deficient number, since it is larger than the sum of its proper divisors (283583).

1385665 is an equidigital number, since it uses as much as digits as its factorization.

1385665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079.

The product of its digits is 21600, while the sum is 34.

The square root of 1385665 is about 1177.1427271151. The cubic root of 1385665 is about 111.4857643686.

The spelling of 1385665 in words is "one million, three hundred eighty-five thousand, six hundred sixty-five".