1205404055 has 8 divisors (see below), whose sum is σ = 1449585072. Its totient is φ = 962256448.

The previous prime is 1205404049. The next prime is 1205404063. The reversal of 1205404055 is 5504045021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1205404055 - 2⁸ = 1205403799 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 7 ways as a sum of consecutive naturals, for example, 255782 + ... + 260451.

It is an arithmetic number, because the mean of its divisors is an integer number (181198134).

Almost surely, 2^1205404055 is an apocalyptic number.

1205404055 is a deficient number, since it is larger than the sum of its proper divisors (244181017).

1205404055 is an equidigital number, since it uses as much as digits as its factorization.

1205404055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516705.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 1205404055 is about 34718.9293469715. The cubic root of 1205404055 is about 1064.2513654022.

Adding to 1205404055 its reverse (5504045021), we get a palindrome (6709449076).

The spelling of 1205404055 in words is "one billion, two hundred five million, four hundred four thousand, fifty-five".