1205666 has 16 divisors (see below), whose sum is σ = 2255040. Its totient is φ = 469680.

The previous prime is 1205663. The next prime is 1205669. The reversal of 1205666 is 6665021.

It is an interprime number because it is at equal distance from previous prime (1205663) and next prime (1205669).

It is not an unprimeable number, because it can be changed into a prime (1205663) 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, 3761 + ... + 4068.

It is an arithmetic number, because the mean of its divisors is an integer number (140940).

2^1205666 is an apocalyptic number.

1205666 is a deficient number, since it is larger than the sum of its proper divisors (1049374).

1205666 is a wasteful number, since it uses less digits than its factorization.

1205666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7849.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1205666 is about 1098.0282327882. The cubic root of 1205666 is about 106.4328450241.

The spelling of 1205666 in words is "one million, two hundred five thousand, six hundred sixty-six".