1209006 has 40 divisors (see below), whose sum is σ = 2874960. Its totient is φ = 378432.

The previous prime is 1208957. The next prime is 1209007. The reversal of 1209006 is 6009021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1209006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2535 + ... + 2973.

It is an arithmetic number, because the mean of its divisors is an integer number (71874).

2^1209006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437480).

1209006 is an abundant number, since it is smaller than the sum of its proper divisors (1665954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1209006 is a wasteful number, since it uses less digits than its factorization.

1209006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1209006 is about 1099.5480889893. The cubic root of 1209006 is about 106.5310363819.

The spelling of 1209006 in words is "one million, two hundred nine thousand, six".