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200001 = 3163409

200001 has 8 divisors (see below), whose sum is σ = 268960. Its totient is φ = 132192.

The previous prime is 199999. The next prime is 200003. The reversal of 200001 is 100002.

It is an interprime number because it is at equal distance from previous prime (199999) and next prime (200003).

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

It is not a de Polignac number, because 200001 - 21 = 199999 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285 + ... + 693.

It is an arithmetic number, because the mean of its divisors is an integer number (33620).

2200001 is an apocalyptic number.

It is an amenable number.

200001 is a deficient number, since it is larger than the sum of its proper divisors (68959).

200001 is a wasteful number, since it uses less digits than its factorization.

200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575.

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

The square root of 200001 is about 447.2147135325. The cubic root of 200001 is about 58.4804522314.

Adding to 200001 its reverse (100002), we get a palindrome (300003).

Subtracting from 200001 its reverse (100002), we obtain a palindrome (99999).

Multiplying 200001 by its reverse (100002), we get a palindrome (20000500002).

The spelling of 200001 in words is "two hundred thousand, one", and thus it is an iban number.

Divisors: 1 3 163 409 489 1227 66667 200001