1208005 has 4 divisors (see below), whose sum is σ = 1449612. Its totient is φ = 966400.

The previous prime is 1207981. The next prime is 1208017. The reversal of 1208005 is 5008021.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 487204 + 720801 = 698^2 + 849^2 .

It is not a de Polignac number, because 1208005 - 2¹³ = 1199813 is a prime.

It is an Ulam number.

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 1208005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120796 + ... + 120805.

It is an arithmetic number, because the mean of its divisors is an integer number (362403).

2^1208005 is an apocalyptic number.

It is an amenable number.

1208005 is a deficient number, since it is larger than the sum of its proper divisors (241607).

1208005 is an equidigital number, since it uses as much as digits as its factorization.

1208005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241606.

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

The square root of 1208005 is about 1099.0928077283. The cubic root of 1208005 is about 106.5016273712.

Adding to 1208005 its sum of digits (16), we get a palindrome (1208021).

The spelling of 1208005 in words is "one million, two hundred eight thousand, five".