1003636 has 12 divisors (see below), whose sum is σ = 1778112. Its totient is φ = 495608.

The previous prime is 1003631. The next prime is 1003679. The reversal of 1003636 is 6363001.

It is a happy number.

1003636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

1003636 is a modest number, since divided by 3636 gives 100 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180 + ... + 1843.

It is an arithmetic number, because the mean of its divisors is an integer number (148176).

2^1003636 is an apocalyptic number.

It is an amenable number.

1003636 is a deficient number, since it is larger than the sum of its proper divisors (774476).

1003636 is a wasteful number, since it uses less digits than its factorization.

1003636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110 (or 3108 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1003636 is about 1001.8163504355. The cubic root of 1003636 is about 100.1210534016.

Adding to 1003636 its reverse (6363001), we get a palindrome (7366637).

The spelling of 1003636 in words is "one million, three thousand, six hundred thirty-six".