165041001 has 24 divisors (see below), whose sum is σ = 247428480. Its totient is φ = 105882336.

The previous prime is 165040961. The next prime is 165041003. The reversal of 165041001 is 100140561.

165041001 is a `hidden beast` number, since 1 + 650 + 4 + 10 + 0 + 1 = 666.

It is not a de Polignac number, because 165041001 - 2⁷ = 165040873 is a prime.

It is a super-2 number, since 2×165041001² = 54477064022164002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165041003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94926 + ... + 96648.

It is an arithmetic number, because the mean of its divisors is an integer number (10309520).

Almost surely, 2^165041001 is an apocalyptic number.

It is an amenable number.

165041001 is a deficient number, since it is larger than the sum of its proper divisors (82387479).

165041001 is a wasteful number, since it uses less digits than its factorization.

165041001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125 (or 2122 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 165041001 is about 12846.8284412924. The cubic root of 165041001 is about 548.5260822996.

Adding to 165041001 its reverse (100140561), we get a palindrome (265181562).

The spelling of 165041001 in words is "one hundred sixty-five million, forty-one thousand, one".