1155266099 has 8 divisors (see below), whose sum is σ = 1261176672. Its totient is φ = 1051790400.

The previous prime is 1155266089. The next prime is 1155266107. The reversal of 1155266099 is 9906625511.

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 1155266099 - 2²⁰ = 1154217523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155266029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607727 + ... + 609624.

It is an arithmetic number, because the mean of its divisors is an integer number (157647084).

Almost surely, 2^1155266099 is an apocalyptic number.

1155266099 is a deficient number, since it is larger than the sum of its proper divisors (105910573).

1155266099 is a wasteful number, since it uses less digits than its factorization.

1155266099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217437.

The product of its (nonzero) digits is 145800, while the sum is 44.

The square root of 1155266099 is about 33989.2056247274. The cubic root of 1155266099 is about 1049.2863174403.

The spelling of 1155266099 in words is "one billion, one hundred fifty-five million, two hundred sixty-six thousand, ninety-nine".