201000 has 64 divisors (see below), whose sum is σ = 636480. Its totient is φ = 52800.

The previous prime is 200989. The next prime is 201007. The reversal of 201000 is 102.

It is a Harshad number since it is a multiple of its sum of digits (3).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (201007) by changing a digit.

201000 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2967 + ... + 3033.

It is an arithmetic number, because the mean of its divisors is an integer number (9945).

2²⁰¹⁰⁰⁰ is an apocalyptic number.

201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

201000 is the 240-th nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318240).

201000 is an abundant number, since it is smaller than the sum of its proper divisors (435480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201000 is a wasteful number, since it uses less digits than its factorization.

201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 3.

The square root of 201000 is about 448.3302354292. The cubic root of 201000 is about 58.5776600265.

Adding to 201000 its reverse (102), we get a palindrome (201102).

The spelling of 201000 in words is "two hundred one thousand", and thus it is an iban number.