2180001 has 8 divisors (see below), whose sum is σ = 2968704. Its totient is φ = 1422320.

The previous prime is 2179997. The next prime is 2180021. The reversal of 2180001 is 1000812.

It is a happy number.

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 2180001 - 2² = 2179997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2180021) 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, 7590 + ... + 7871.

It is an arithmetic number, because the mean of its divisors is an integer number (371088).

2^2180001 is an apocalyptic number.

It is an amenable number.

2180001 is a deficient number, since it is larger than the sum of its proper divisors (788703).

2180001 is a wasteful number, since it uses less digits than its factorization.

2180001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15511.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2180001 is about 1476.4826446660. The cubic root of 2180001 is about 129.6638455237.

Adding to 2180001 its reverse (1000812), we get a palindrome (3180813).

The spelling of 2180001 in words is "two million, one hundred eighty thousand, one".