1236006 has 32 divisors (see below), whose sum is σ = 2810880. Its totient is φ = 402408.

The previous prime is 1235999. The next prime is 1236017. The reversal of 1236006 is 6006321.

It is a happy number.

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 1236006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2295 + ... + 2781.

It is an arithmetic number, because the mean of its divisors is an integer number (87840).

2^1236006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1236006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1405440).

1236006 is an abundant number, since it is smaller than the sum of its proper divisors (1574874).

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

1236006 is a wasteful number, since it uses less digits than its factorization.

1236006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1236006 is about 1111.7580672071. The cubic root of 1236006 is about 107.3182361990.

The spelling of 1236006 in words is "one million, two hundred thirty-six thousand, six".