1223206 has 4 divisors (see below), whose sum is σ = 1834812. Its totient is φ = 611602.

The previous prime is 1223203. The next prime is 1223207. The reversal of 1223206 is 6023221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1223206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305800 + ... + 305803.

It is an arithmetic number, because the mean of its divisors is an integer number (458703).

2^1223206 is an apocalyptic number.

1223206 is a deficient number, since it is larger than the sum of its proper divisors (611606).

1223206 is an equidigital number, since it uses as much as digits as its factorization.

1223206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611605.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1223206 is about 1105.9864375299. The cubic root of 1223206 is about 106.9464896793.

Adding to 1223206 its reverse (6023221), we get a palindrome (7246427).

The spelling of 1223206 in words is "one million, two hundred twenty-three thousand, two hundred six".