1200004205 has 4 divisors (see below), whose sum is σ = 1440005052. Its totient is φ = 960003360.

The previous prime is 1200004199. The next prime is 1200004229. The reversal of 1200004205 is 5024000021.

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 537405124 + 662599081 = 23182^2 + 25741^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1200004205 is a prime.

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 1200004205.

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, 120000416 + ... + 120000425.

It is an arithmetic number, because the mean of its divisors is an integer number (360001263).

Almost surely, 2^1200004205 is an apocalyptic number.

It is an amenable number.

1200004205 is a deficient number, since it is larger than the sum of its proper divisors (240000847).

1200004205 is an equidigital number, since it uses as much as digits as its factorization.

1200004205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240000846.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1200004205 is about 34641.0768452714. The cubic root of 1200004205 is about 1062.6598104254.

Adding to 1200004205 its reverse (5024000021), we get a palindrome (6224004226).

The spelling of 1200004205 in words is "one billion, two hundred million, four thousand, two hundred five".