1439887 has 4 divisors (see below), whose sum is σ = 1444320. Its totient is φ = 1435456.

The previous prime is 1439881. The next prime is 1439891. The reversal of 1439887 is 7889341.

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

It is a cyclic number.

It is not a de Polignac number, because 1439887 - 2⁷ = 1439759 is a prime.

It is a Duffinian number.

1439887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1439881) 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 3 ways as a sum of consecutive naturals, for example, 1687 + ... + 2392.

It is an arithmetic number, because the mean of its divisors is an integer number (361080).

2^1439887 is an apocalyptic number.

1439887 is a deficient number, since it is larger than the sum of its proper divisors (4433).

1439887 is an equidigital number, since it uses as much as digits as its factorization.

1439887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4432.

The product of its digits is 48384, while the sum is 40.

The square root of 1439887 is about 1199.9529157429. The cubic root of 1439887 is about 112.9213695809.

The spelling of 1439887 in words is "one million, four hundred thirty-nine thousand, eight hundred eighty-seven".