1165442555 has 16 divisors (see below), whose sum is σ = 1421137440. Its totient is φ = 917317632.

The previous prime is 1165442543. The next prime is 1165442569. The reversal of 1165442555 is 5552445611.

It is a cyclic number.

It is not a de Polignac number, because 1165442555 - 2⁶ = 1165442491 is a prime.

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, 369947 + ... + 373083.

It is an arithmetic number, because the mean of its divisors is an integer number (88821090).

Almost surely, 2^1165442555 is an apocalyptic number.

1165442555 is a deficient number, since it is larger than the sum of its proper divisors (255694885).

1165442555 is a wasteful number, since it uses less digits than its factorization.

1165442555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4318.

The product of its digits is 120000, while the sum is 38.

The square root of 1165442555 is about 34138.5786903907. The cubic root of 1165442555 is about 1052.3582836444.

The spelling of 1165442555 in words is "one billion, one hundred sixty-five million, four hundred forty-two thousand, five hundred fifty-five".