1002805 has 8 divisors (see below), whose sum is σ = 1213344. Its totient is φ = 795600.

The previous prime is 1002797. The next prime is 1002809. The reversal of 1002805 is 5082001.

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 1002805 - 2³ = 1002797 is a prime.

It is a Duffinian number.

1002805 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002809) 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, 111 + ... + 1420.

It is an arithmetic number, because the mean of its divisors is an integer number (151668).

2^1002805 is an apocalyptic number.

It is an amenable number.

1002805 is a deficient number, since it is larger than the sum of its proper divisors (210539).

1002805 is a wasteful number, since it uses less digits than its factorization.

1002805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667.

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

The square root of 1002805 is about 1001.4015178738. The cubic root of 1002805 is about 100.0934127135.

Adding to 1002805 its reverse (5082001), we get a palindrome (6084806).

The spelling of 1002805 in words is "one million, two thousand, eight hundred five".