1800201 has 16 divisors (see below), whose sum is σ = 2670080. Its totient is φ = 1071360.

The previous prime is 1800199. The next prime is 1800209. The reversal of 1800201 is 1020081.

It is a happy number.

It is not a de Polignac number, because 1800201 - 2¹ = 1800199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1800209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465 + ... + 1953.

It is an arithmetic number, because the mean of its divisors is an integer number (166880).

2^1800201 is an apocalyptic number.

It is an amenable number.

1800201 is a deficient number, since it is larger than the sum of its proper divisors (869879).

1800201 is a wasteful number, since it uses less digits than its factorization.

1800201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536.

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

The square root of 1800201 is about 1341.7156926860. The cubic root of 1800201 is about 121.6485676044.

Adding to 1800201 its reverse (1020081), we get a palindrome (2820282).

The spelling of 1800201 in words is "one million, eight hundred thousand, two hundred one".