1221206 has 16 divisors (see below), whose sum is σ = 2204160. Its totient is φ = 495720.

The previous prime is 1221197. The next prime is 1221221. The reversal of 1221206 is 6021221.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2030 + ... + 2561.

It is an arithmetic number, because the mean of its divisors is an integer number (137760).

2^1221206 is an apocalyptic number.

1221206 is a deficient number, since it is larger than the sum of its proper divisors (982954).

1221206 is a wasteful number, since it uses less digits than its factorization.

1221206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4619.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1221206 is about 1105.0818974176. The cubic root of 1221206 is about 106.8881703501. Note that the first 3 decimals are identical.

Adding to 1221206 its reverse (6021221), we get a palindrome (7242427).

The spelling of 1221206 in words is "one million, two hundred twenty-one thousand, two hundred six".