1165523005 has 8 divisors (see below), whose sum is σ = 1399600224. Its totient is φ = 931770000.

The previous prime is 1165522991. The next prime is 1165523011. The reversal of 1165523005 is 5003255611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1165523005 - 2⁷ = 1165522877 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 7 ways as a sum of consecutive naturals, for example, 73071 + ... + 87580.

It is an arithmetic number, because the mean of its divisors is an integer number (174950028).

Almost surely, 2^1165523005 is an apocalyptic number.

It is an amenable number.

1165523005 is a deficient number, since it is larger than the sum of its proper divisors (234077219).

1165523005 is a wasteful number, since it uses less digits than its factorization.

1165523005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162107.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1165523005 is about 34139.7569557840. The cubic root of 1165523005 is about 1052.3824977010.

Adding to 1165523005 its reverse (5003255611), we get a palindrome (6168778616).

The spelling of 1165523005 in words is "one billion, one hundred sixty-five million, five hundred twenty-three thousand, five".