1155115105 has 4 divisors (see below), whose sum is σ = 1386138132. Its totient is φ = 924092080.

The previous prime is 1155115081. The next prime is 1155115123. The reversal of 1155115105 is 5015115511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180176929 + 974938176 = 13423^2 + 31224^2 .

It is not a de Polignac number, because 1155115105 - 2⁹ = 1155114593 is a prime.

It is a super-2 number, since 2×1155115105² = 2668581811598322050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155115105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115511506 + ... + 115511515.

It is an arithmetic number, because the mean of its divisors is an integer number (346534533).

Almost surely, 2^1155115105 is an apocalyptic number.

It is an amenable number.

1155115105 is a deficient number, since it is larger than the sum of its proper divisors (231023027).

1155115105 is an equidigital number, since it uses as much as digits as its factorization.

1155115105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231023026.

The product of its (nonzero) digits is 625, while the sum is 25.

The square root of 1155115105 is about 33986.9843469526. The cubic root of 1155115105 is about 1049.2406013230.

The spelling of 1155115105 in words is "one billion, one hundred fifty-five million, one hundred fifteen thousand, one hundred five".