1385305 has 8 divisors (see below), whose sum is σ = 1668744. Its totient is φ = 1104000.

The previous prime is 1385303. The next prime is 1385327. The reversal of 1385305 is 5035831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 227529 + 1157776 = 477^2 + 1076^2 .

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

It is not a de Polignac number, because 1385305 - 2¹ = 1385303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1385305.

It is not an unprimeable number, because it can be changed into a prime (1385303) 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, 2005 + ... + 2605.

It is an arithmetic number, because the mean of its divisors is an integer number (208593).

2^1385305 is an apocalyptic number.

It is an amenable number.

1385305 is a deficient number, since it is larger than the sum of its proper divisors (283439).

1385305 is an equidigital number, since it uses as much as digits as its factorization.

1385305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1385305 is about 1176.9898045438. The cubic root of 1385305 is about 111.4761087517.

Subtracting from 1385305 its sum of digits (25), we obtain a triangular number (1385280 = T₁₆₆₄).

The spelling of 1385305 in words is "one million, three hundred eighty-five thousand, three hundred five".