1001165995 has 8 divisors (see below), whose sum is σ = 1202012784. Its totient is φ = 800523744.

The previous prime is 1001165951. The next prime is 1001165999. The reversal of 1001165995 is 5995611001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001165995 - 2¹⁵ = 1001133227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001165999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40149 + ... + 60118.

It is an arithmetic number, because the mean of its divisors is an integer number (150251598).

Almost surely, 2^1001165995 is an apocalyptic number.

1001165995 is a deficient number, since it is larger than the sum of its proper divisors (200846789).

1001165995 is a wasteful number, since it uses less digits than its factorization.

1001165995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102269.

The product of its (nonzero) digits is 12150, while the sum is 37.

The square root of 1001165995 is about 31641.2072304456. The cubic root of 1001165995 is about 1000.3885140373.

Adding to 1001165995 its reverse (5995611001), we get a palindrome (6996776996).

The spelling of 1001165995 in words is "one billion, one million, one hundred sixty-five thousand, nine hundred ninety-five".