1156065905 has 16 divisors (see below), whose sum is σ = 1469211264. Its totient is φ = 871432320.

The previous prime is 1156065899. The next prime is 1156065917. The reversal of 1156065905 is 5095606511.

It is a happy number.

It is not a de Polignac number, because 1156065905 - 2¹⁰ = 1156064881 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 67316 + ... + 82725.

It is an arithmetic number, because the mean of its divisors is an integer number (91825704).

Almost surely, 2^1156065905 is an apocalyptic number.

It is an amenable number.

1156065905 is a deficient number, since it is larger than the sum of its proper divisors (313145359).

1156065905 is a wasteful number, since it uses less digits than its factorization.

1156065905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150136.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 1156065905 is about 34000.9691773632. The cubic root of 1156065905 is about 1049.5284065136.

The spelling of 1156065905 in words is "one billion, one hundred fifty-six million, sixty-five thousand, nine hundred five".