210001 has 8 divisors (see below), whose sum is σ = 242784. Its totient is φ = 179520.

The previous prime is 209987. The next prime is 210011. The reversal of 210001 is 100012.

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

It is not a de Polignac number, because 210001 - 2¹¹ = 207953 is a prime.

It is a Duffinian number.

210001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (210011) 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, 375 + ... + 748.

It is an arithmetic number, because the mean of its divisors is an integer number (30348).

2²¹⁰⁰⁰¹ is an apocalyptic number.

It is an amenable number.

210001 is a deficient number, since it is larger than the sum of its proper divisors (32783).

210001 is a wasteful number, since it uses less digits than its factorization.

210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151.

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 210001 is about 458.2586605837. The cubic root of 210001 is about 59.4393138754.

Adding to 210001 its reverse (100012), we get a palindrome (310013).

Multiplying 210001 by its reverse (100012), we get a palindrome (21002620012).

It can be divided in two parts, 2 and 10001, that multiplied together give a palindrome (20002).

The spelling of 210001 in words is "two hundred ten thousand, one", and thus it is an iban number.