1801205 has 16 divisors (see below), whose sum is σ = 2519424. Its totient is φ = 1210560.

The previous prime is 1801187. The next prime is 1801207. The reversal of 1801205 is 5021081.

It is not a de Polignac number, because 1801205 - 2⁸ = 1800949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801207) 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, 1370 + ... + 2340.

It is an arithmetic number, because the mean of its divisors is an integer number (157464).

2^1801205 is an apocalyptic number.

It is an amenable number.

1801205 is a deficient number, since it is larger than the sum of its proper divisors (718219).

1801205 is an equidigital number, since it uses as much as digits as its factorization.

1801205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1801205 is about 1342.0897883525. The cubic root of 1801205 is about 121.6711784987.

Adding to 1801205 its reverse (5021081), we get a palindrome (6822286).

The spelling of 1801205 in words is "one million, eight hundred one thousand, two hundred five".