1006636 has 12 divisors (see below), whose sum is σ = 1769040. Its totient is φ = 501200.

The previous prime is 1006633. The next prime is 1006637. The reversal of 1006636 is 6366001.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1006633) 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 3 ways as a sum of consecutive naturals, for example, 1086 + ... + 1786.

It is an arithmetic number, because the mean of its divisors is an integer number (147420).

2^1006636 is an apocalyptic number.

It is an amenable number.

1006636 is a deficient number, since it is larger than the sum of its proper divisors (762404).

1006636 is a wasteful number, since it uses less digits than its factorization.

1006636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064 (or 1062 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1006636 is about 1003.3125136267. The cubic root of 1006636 is about 100.2207125015.

The spelling of 1006636 in words is "one million, six thousand, six hundred thirty-six".