1048639 has 8 divisors (see below), whose sum is σ = 1105920. Its totient is φ = 992376.

The previous prime is 1048633. The next prime is 1048661. The reversal of 1048639 is 9368401.

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

It is a cyclic number.

It is not a de Polignac number, because 1048639 - 2⁹ = 1048127 is a prime.

It is a d-powerful number, because it can be written as 1 + 0 + 4¹⁰ + 8 + 6² + 3² + 9 .

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 1048639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1048633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2742 + ... + 3100.

It is an arithmetic number, because the mean of its divisors is an integer number (138240).

2^1048639 is an apocalyptic number.

1048639 is a deficient number, since it is larger than the sum of its proper divisors (57281).

1048639 is a wasteful number, since it uses less digits than its factorization.

1048639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1048639 is about 1024.0307612567. The cubic root of 1048639 is about 101.5957019179.

The spelling of 1048639 in words is "one million, forty-eight thousand, six hundred thirty-nine".