1288265099 has 6 divisors (see below), whose sum is σ = 1416027060. Its totient is φ = 1171149980.

The previous prime is 1288265093. The next prime is 1288265101. The reversal of 1288265099 is 9905628821.

It is not a de Polignac number, because 1288265099 - 2²⁴ = 1271487883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288265093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5323289 + ... + 5323530.

It is an arithmetic number, because the mean of its divisors is an integer number (236004510).

Almost surely, 2^1288265099 is an apocalyptic number.

1288265099 is a deficient number, since it is larger than the sum of its proper divisors (127761961).

1288265099 is a wasteful number, since it uses less digits than its factorization.

1288265099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10646841 (or 10646830 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 1288265099 is about 35892.4100472509. The cubic root of 1288265099 is about 1088.0990064869.

The spelling of 1288265099 in words is "one billion, two hundred eighty-eight million, two hundred sixty-five thousand, ninety-nine".