1318385 has 4 divisors (see below), whose sum is σ = 1582068. Its totient is φ = 1054704.

The previous prime is 1318379. The next prime is 1318409. The reversal of 1318385 is 5838131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 300304 + 1018081 = 548^2 + 1009^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318385 - 2¹⁰ = 1317361 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 131834 + ... + 131843.

It is an arithmetic number, because the mean of its divisors is an integer number (395517).

2^1318385 is an apocalyptic number.

It is an amenable number.

1318385 is a deficient number, since it is larger than the sum of its proper divisors (263683).

1318385 is an equidigital number, since it uses as much as digits as its factorization.

1318385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263682.

The product of its digits is 2880, while the sum is 29.

The square root of 1318385 is about 1148.2094756620. The cubic root of 1318385 is about 109.6513756064.

The spelling of 1318385 in words is "one million, three hundred eighteen thousand, three hundred eighty-five".