1338985 has 4 divisors (see below), whose sum is σ = 1606788. Its totient is φ = 1071184.

The previous prime is 1338979. The next prime is 1339001. The reversal of 1338985 is 5898331.

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 364816 + 974169 = 604^2 + 987^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338985 - 2⁹ = 1338473 is a prime.

It is a Duffinian number.

1338985 is a lucky 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, 133894 + ... + 133903.

It is an arithmetic number, because the mean of its divisors is an integer number (401697).

2^1338985 is an apocalyptic number.

It is an amenable number.

1338985 is a deficient number, since it is larger than the sum of its proper divisors (267803).

1338985 is an equidigital number, since it uses as much as digits as its factorization.

1338985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267802.

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

The square root of 1338985 is about 1157.1451940012. The cubic root of 1338985 is about 110.2195340223.

It can be divided in two parts, 133898 and 5, that added together give a triangular number (133903 = T₅₁₇).

The spelling of 1338985 in words is "one million, three hundred thirty-eight thousand, nine hundred eighty-five".