2165001 has 8 divisors (see below), whose sum is σ = 3056544. Its totient is φ = 1358400.

The previous prime is 2164991. The next prime is 2165017. The reversal of 2165001 is 1005612.

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

It is not a de Polignac number, because 2165001 - 2⁹ = 2164489 is a prime.

2165001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2165081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21175 + ... + 21276.

It is an arithmetic number, because the mean of its divisors is an integer number (382068).

2^2165001 is an apocalyptic number.

It is an amenable number.

2165001 is a deficient number, since it is larger than the sum of its proper divisors (891543).

2165001 is a wasteful number, since it uses less digits than its factorization.

2165001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42471.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 2165001 is about 1471.3942367700. The cubic root of 2165001 is about 129.3657668035.

The spelling of 2165001 in words is "two million, one hundred sixty-five thousand, one".