1800207 has 6 divisors (see below), whose sum is σ = 2600312. Its totient is φ = 1200132.

The previous prime is 1800199. The next prime is 1800209. The reversal of 1800207 is 7020081.

It is not a de Polignac number, because 1800207 - 2³ = 1800199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1800207.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 100003 + ... + 100020.

2^1800207 is an apocalyptic number.

1800207 is a deficient number, since it is larger than the sum of its proper divisors (800105).

1800207 is a wasteful number, since it uses less digits than its factorization.

1800207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200029 (or 200026 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 1800207 is about 1341.7179286273. The cubic root of 1800207 is about 121.6487027543.

Adding to 1800207 its reverse (7020081), we get a palindrome (8820288).

The spelling of 1800207 in words is "one million, eight hundred thousand, two hundred seven".