1066209 has 8 divisors (see below), whose sum is σ = 1432992. Its totient is φ = 705120.

The previous prime is 1066159. The next prime is 1066217. The reversal of 1066209 is 9026601.

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

It is not a de Polignac number, because 1066209 - 2⁹ = 1065697 is a prime.

It is a super-2 number, since 2×1066209² = 2273603263362, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1066279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964 + ... + 1749.

It is an arithmetic number, because the mean of its divisors is an integer number (179124).

2^1066209 is an apocalyptic number.

It is an amenable number.

1066209 is a deficient number, since it is larger than the sum of its proper divisors (366783).

1066209 is a wasteful number, since it uses less digits than its factorization.

1066209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1066209 is about 1032.5739682948. The cubic root of 1066209 is about 102.1599758002.

It can be divided in two parts, 1066 and 209, that added together give a triangular number (1275 = T₅₀).

The spelling of 1066209 in words is "one million, sixty-six thousand, two hundred nine".