1662205 has 4 divisors (see below), whose sum is σ = 1994652. Its totient is φ = 1329760.

The previous prime is 1662191. The next prime is 1662211. The reversal of 1662205 is 5022661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 534361 = 1062^2 + 731^2 .

It is not a de Polignac number, because 1662205 - 2¹³ = 1654013 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166216 + ... + 166225.

It is an arithmetic number, because the mean of its divisors is an integer number (498663).

2^1662205 is an apocalyptic number.

It is an amenable number.

1662205 is a deficient number, since it is larger than the sum of its proper divisors (332447).

1662205 is an equidigital number, since it uses as much as digits as its factorization.

1662205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332446.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1662205 is about 1289.2652946543. The cubic root of 1662205 is about 118.4572177868.

Adding to 1662205 its reverse (5022661), we get a palindrome (6684866).

The spelling of 1662205 in words is "one million, six hundred sixty-two thousand, two hundred five".