1296005955 has 64 divisors (see below), whose sum is σ = 2214770688. Its totient is φ = 645765120.

The previous prime is 1296005947. The next prime is 1296005959. The reversal of 1296005955 is 5595006921.

It is not a de Polignac number, because 1296005955 - 2³ = 1296005947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1296005959) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 3845547 + ... + 3845883.

It is an arithmetic number, because the mean of its divisors is an integer number (34605792).

Almost surely, 2^1296005955 is an apocalyptic number.

1296005955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1296005955 is a deficient number, since it is larger than the sum of its proper divisors (918764733).

1296005955 is a wasteful number, since it uses less digits than its factorization.

1296005955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596.

The product of its (nonzero) digits is 121500, while the sum is 42.

The square root of 1296005955 is about 36000.0827082383. The cubic root of 1296005955 is about 1090.2740255969.

The spelling of 1296005955 in words is "one billion, two hundred ninety-six million, five thousand, nine hundred fifty-five".