1439985 has 16 divisors (see below), whose sum is σ = 2439936. Its totient is φ = 722688.

The previous prime is 1439969. The next prime is 1439989. The reversal of 1439985 is 5899341.

1439985 = 283² + 284² + ... + 299².

It is not a de Polignac number, because 1439985 - 2⁴ = 1439969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1439989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2569 + ... + 3078.

It is an arithmetic number, because the mean of its divisors is an integer number (152496).

2^1439985 is an apocalyptic number.

1439985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1439985 is a deficient number, since it is larger than the sum of its proper divisors (999951).

1439985 is a wasteful number, since it uses less digits than its factorization.

1439985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672.

The product of its digits is 38880, while the sum is 39.

The square root of 1439985 is about 1199.9937499837. The cubic root of 1439985 is about 112.9239313660.

The spelling of 1439985 in words is "one million, four hundred thirty-nine thousand, nine hundred eighty-five".