1028005 has 8 divisors (see below), whose sum is σ = 1345824. Its totient is φ = 747600.

The previous prime is 1028003. The next prime is 1028011. The reversal of 1028005 is 5008201.

It is a happy number.

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

It is not a de Polignac number, because 1028005 - 2¹ = 1028003 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 1028005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9291 + ... + 9400.

It is an arithmetic number, because the mean of its divisors is an integer number (168228).

2^1028005 is an apocalyptic number.

It is an amenable number.

1028005 is a deficient number, since it is larger than the sum of its proper divisors (317819).

1028005 is a wasteful number, since it uses less digits than its factorization.

1028005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18707.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1028005 is about 1013.9058141662. The cubic root of 1028005 is about 100.9249188759.

The spelling of 1028005 in words is "one million, twenty-eight thousand, five".