2169001 has 4 divisors (see below), whose sum is σ = 2172100.
Its totient is φ = 2165904.
The previous prime is 2168989. The next prime is 2169007. The reversal of 2169001 is 1009612.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in 2 ways, for example, as 1752976 + 416025 = 1324^2 + 645^2
It is a cyclic number.
It is not a de Polignac number, because 2169001 - 211 = 2166953 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 2169001.
It is not an unprimeable number, because it can be changed into a prime (2169007) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55 + ... + 2083.
It is an arithmetic number, because the mean of its divisors is an integer number (543025).
22169001 is an apocalyptic number.
It is an amenable number.
2169001 is a deficient number, since it is larger than the sum of its proper divisors (3099).
2169001 is a wasteful number, since it uses less digits than its factorization.
2169001 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3098.
The product of its (nonzero) digits is 108, while the sum is 19.
The square root of 2169001 is about 1472.7528645363.
The cubic root of 2169001 is about 129.4453887391.
The spelling of 2169001 in words is "two million, one hundred sixty-nine thousand, one".