1229666 has 8 divisors (see below), whose sum is σ = 1861164. Its totient is φ = 609280.

The previous prime is 1229663. The next prime is 1229689. The reversal of 1229666 is 6669221.

It can be written as a sum of positive squares in 2 ways, for example, as 1177225 + 52441 = 1085^2 + 229^2 .

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 (1229663) 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, 2495 + ... + 2946.

2^1229666 is an apocalyptic number.

1229666 is a deficient number, since it is larger than the sum of its proper divisors (631498).

1229666 is a wasteful number, since it uses less digits than its factorization.

1229666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556.

The product of its digits is 7776, while the sum is 32.

The square root of 1229666 is about 1108.9030615883. The cubic root of 1229666 is about 107.1344279506.

The spelling of 1229666 in words is "one million, two hundred twenty-nine thousand, six hundred sixty-six".