1206500330405 has 4 divisors (see below), whose sum is σ = 1447800396492. Its totient is φ = 965200264320.

The previous prime is 1206500330351. The next prime is 1206500330411. The reversal of 1206500330405 is 5040330056021.

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 418011385444 + 788488944961 = 646538^2 + 887969^2 .

It is not a de Polignac number, because 1206500330405 - 2⁶ = 1206500330341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120650033036 + ... + 120650033045.

It is an arithmetic number, because the mean of its divisors is an integer number (361950099123).

Almost surely, 2^{1206500330405} is an apocalyptic number.

It is an amenable number.

1206500330405 is a deficient number, since it is larger than the sum of its proper divisors (241300066087).

1206500330405 is an equidigital number, since it uses as much as digits as its factorization.

1206500330405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241300066086.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 1206500330405 its reverse (5040330056021), we get a palindrome (6246830386426).

The spelling of 1206500330405 in words is "one trillion, two hundred six billion, five hundred million, three hundred thirty thousand, four hundred five".