1002004405 has 4 divisors (see below), whose sum is σ = 1202405292.
Its totient is φ = 801603520.
The previous prime is 1002004397. The next prime is 1002004417. The reversal of 1002004405 is 5044002001.
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 722211876 + 279792529 = 26874^2 + 16727^2
It is not a de Polignac number, because 1002004405 - 23 = 1002004397 is a prime.
It is a Duffinian number.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100200436 + ... + 100200445.
It is an arithmetic number, because the mean of its divisors is an integer number (300601323).
Almost surely, 21002004405 is an apocalyptic number.
It is an amenable number.
1002004405 is a deficient number, since it is larger than the sum of its proper divisors (200400887).
1002004405 is an equidigital number, since it uses as much as digits as its factorization.
1002004405 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 200400886.
The product of its (nonzero) digits is 160, while the sum is 16.
The square root of 1002004405 is about 31654.4531622330.
The cubic root of 1002004405 is about 1000.6676890921.
Adding to 1002004405 its reverse (5044002001), we get a palindrome (6046006406).
The spelling of 1002004405 in words is "one billion, two million, four thousand, four hundred five".