1155015065 has 4 divisors (see below), whose sum is σ = 1386018084. Its totient is φ = 924012048.

The previous prime is 1155015049. The next prime is 1155015067. The reversal of 1155015065 is 5605105511.

It is a happy number.

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 658794889 + 496220176 = 25667^2 + 22276^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155015065 - 2⁴ = 1155015049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155015067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115501502 + ... + 115501511.

It is an arithmetic number, because the mean of its divisors is an integer number (346504521).

Almost surely, 2^1155015065 is an apocalyptic number.

It is an amenable number.

1155015065 is a deficient number, since it is larger than the sum of its proper divisors (231003019).

1155015065 is an equidigital number, since it uses as much as digits as its factorization.

1155015065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231003018.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 1155015065 is about 33985.5125752136. The cubic root of 1155015065 is about 1049.2103102407.

The spelling of 1155015065 in words is "one billion, one hundred fifty-five million, fifteen thousand, sixty-five".