1228205 has 16 divisors (see below), whose sum is σ = 1629504. Its totient is φ = 881280.

The previous prime is 1228193. The next prime is 1228219. The reversal of 1228205 is 5028221.

It is not a de Polignac number, because 1228205 - 2⁸ = 1227949 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7454 + ... + 7616.

It is an arithmetic number, because the mean of its divisors is an integer number (101844).

2^1228205 is an apocalyptic number.

It is an amenable number.

1228205 is a deficient number, since it is larger than the sum of its proper divisors (401299).

1228205 is a wasteful number, since it uses less digits than its factorization.

1228205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1228205 is about 1108.2441066841. The cubic root of 1228205 is about 107.0919813486.

The spelling of 1228205 in words is "one million, two hundred twenty-eight thousand, two hundred five".