1009636 has 6 divisors (see below), whose sum is σ = 1766870. Its totient is φ = 504816.

The previous prime is 1009627. The next prime is 1009637. The reversal of 1009636 is 6369001.

It can be written as a sum of positive squares in only one way, i.e., 649636 + 360000 = 806^2 + 600^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1009636.

It is not an unprimeable number, because it can be changed into a prime (1009637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126201 + ... + 126208.

2^1009636 is an apocalyptic number.

It is an amenable number.

1009636 is a deficient number, since it is larger than the sum of its proper divisors (757234).

1009636 is a wasteful number, since it uses less digits than its factorization.

1009636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252413 (or 252411 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1009636 is about 1004.8064490239. The cubic root of 1009636 is about 100.3201737934.

The spelling of 1009636 in words is "one million, nine thousand, six hundred thirty-six".