1272585099 has 16 divisors (see below), whose sum is σ = 1805120640. Its totient is φ = 794693760.

The previous prime is 1272585077. The next prime is 1272585151. The reversal of 1272585099 is 9905852721.

It is not a de Polignac number, because 1272585099 - 2⁸ = 1272584843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1272585049) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 48369 + ... + 69890.

It is an arithmetic number, because the mean of its divisors is an integer number (112820040).

Almost surely, 2^1272585099 is an apocalyptic number.

1272585099 is a deficient number, since it is larger than the sum of its proper divisors (532535541).

1272585099 is a wasteful number, since it uses less digits than its factorization.

1272585099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118490.

The product of its (nonzero) digits is 453600, while the sum is 48.

The square root of 1272585099 is about 35673.3107378612. The cubic root of 1272585099 is about 1083.6664082799. Note that the first 3 decimals are identical.

The spelling of 1272585099 in words is "one billion, two hundred seventy-two million, five hundred eighty-five thousand, ninety-nine".