1206689 has 8 divisors (see below), whose sum is σ = 1326432. Its totient is φ = 1088640.

The previous prime is 1206683. The next prime is 1206691. The reversal of 1206689 is 9866021.

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

It is a cyclic number.

It is not a de Polignac number, because 1206689 - 2⁸ = 1206433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1206683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1457 + ... + 2129.

It is an arithmetic number, because the mean of its divisors is an integer number (165804).

2^1206689 is an apocalyptic number.

It is an amenable number.

1206689 is a deficient number, since it is larger than the sum of its proper divisors (119743).

1206689 is a wasteful number, since it uses less digits than its factorization.

1206689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1206689 is about 1098.4939690321. The cubic root of 1206689 is about 106.4629390469.

The spelling of 1206689 in words is "one million, two hundred six thousand, six hundred eighty-nine".