1306120655 has 16 divisors (see below), whose sum is σ = 1792627200. Its totient is φ = 894937632.

The previous prime is 1306120643. The next prime is 1306120661. The reversal of 1306120655 is 5560216031.

It is a cyclic number.

It is not a de Polignac number, because 1306120655 - 2⁴ = 1306120639 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34196 + ... + 61494.

It is an arithmetic number, because the mean of its divisors is an integer number (112039200).

Almost surely, 2^1306120655 is an apocalyptic number.

1306120655 is a deficient number, since it is larger than the sum of its proper divisors (486506545).

1306120655 is a wasteful number, since it uses less digits than its factorization.

1306120655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28678.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1306120655 is about 36140.2912965571. The cubic root of 1306120655 is about 1093.1030325476.

Adding to 1306120655 its reverse (5560216031), we get a palindrome (6866336686).

The spelling of 1306120655 in words is "one billion, three hundred six million, one hundred twenty thousand, six hundred fifty-five".