1222406 has 8 divisors (see below), whose sum is σ = 1883280. Its totient is φ = 594648.

The previous prime is 1222393. The next prime is 1222409. The reversal of 1222406 is 6042221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8186 + ... + 8333.

It is an arithmetic number, because the mean of its divisors is an integer number (235410).

2^1222406 is an apocalyptic number.

1222406 is a deficient number, since it is larger than the sum of its proper divisors (660874).

1222406 is a wasteful number, since it uses less digits than its factorization.

1222406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16558.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1222406 is about 1105.6247102883. The cubic root of 1222406 is about 106.9231695816.

Adding to 1222406 its reverse (6042221), we get a palindrome (7264627).

The spelling of 1222406 in words is "one million, two hundred twenty-two thousand, four hundred six".