1165125505 has 16 divisors (see below), whose sum is σ = 1477365120. Its totient is φ = 879666048.

The previous prime is 1165125503. The next prime is 1165125509. The reversal of 1165125505 is 5055215611.

It is a cyclic number.

It is not a de Polignac number, because 1165125505 - 2¹ = 1165125503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165125503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1669 + ... + 48301.

It is an arithmetic number, because the mean of its divisors is an integer number (92335320).

Almost surely, 2^1165125505 is an apocalyptic number.

It is an amenable number.

1165125505 is a deficient number, since it is larger than the sum of its proper divisors (312239615).

1165125505 is a wasteful number, since it uses less digits than its factorization.

1165125505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46920.

The product of its (nonzero) digits is 7500, while the sum is 31.

The square root of 1165125505 is about 34133.9348010158. The cubic root of 1165125505 is about 1052.2628462352.

The spelling of 1165125505 in words is "one billion, one hundred sixty-five million, one hundred twenty-five thousand, five hundred five".