1802205 has 24 divisors (see below), whose sum is σ = 3233880. Its totient is φ = 927360.

The previous prime is 1802197. The next prime is 1802219. The reversal of 1802205 is 5022081.

It can be written as a sum of positive squares in 4 ways, for example, as 168921 + 1633284 = 411^2 + 1278^2 .

It is not a de Polignac number, because 1802205 - 2³ = 1802197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 615 + ... + 1995.

It is an arithmetic number, because the mean of its divisors is an integer number (134745).

2^1802205 is an apocalyptic number.

1802205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1802205 is a deficient number, since it is larger than the sum of its proper divisors (1431675).

1802205 is a wasteful number, since it uses less digits than its factorization.

1802205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1802205 is about 1342.4622899732. The cubic root of 1802205 is about 121.6936909591.

Adding to 1802205 its reverse (5022081), we get a palindrome (6824286).

It can be divided in two parts, 180 and 2205, that multiplied together give a square (396900 = 630²).

The spelling of 1802205 in words is "one million, eight hundred two thousand, two hundred five".