1155305965 has 16 divisors (see below), whose sum is σ = 1533707136. Its totient is φ = 828385600.

The previous prime is 1155305959. The next prime is 1155306017. The reversal of 1155305965 is 5695035511.

It is not a de Polignac number, because 1155305965 - 2¹¹ = 1155303917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144022 + ... + 151831.

It is an arithmetic number, because the mean of its divisors is an integer number (95856696).

Almost surely, 2^1155305965 is an apocalyptic number.

It is an amenable number.

1155305965 is a deficient number, since it is larger than the sum of its proper divisors (378401171).

1155305965 is a wasteful number, since it uses less digits than its factorization.

1155305965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295940.

The product of its (nonzero) digits is 101250, while the sum is 40.

The square root of 1155305965 is about 33989.7920705614. The cubic root of 1155305965 is about 1049.2983869156.

The spelling of 1155305965 in words is "one billion, one hundred fifty-five million, three hundred five thousand, nine hundred sixty-five".