1020635 has 24 divisors (see below), whose sum is σ = 1544928. Its totient is φ = 633600.

The previous prime is 1020631. The next prime is 1020667. The reversal of 1020635 is 5360201.

It is not a de Polignac number, because 1020635 - 2² = 1020631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020631) 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 in 23 ways as a sum of consecutive naturals, for example, 4115 + ... + 4355.

It is an arithmetic number, because the mean of its divisors is an integer number (64372).

2^1020635 is an apocalyptic number.

1020635 is a deficient number, since it is larger than the sum of its proper divisors (524293).

1020635 is a wasteful number, since it uses less digits than its factorization.

1020635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1020635 is about 1010.2648167684. The cubic root of 1020635 is about 100.6831556887.

Adding to 1020635 its reverse (5360201), we get a palindrome (6380836).

The spelling of 1020635 in words is "one million, twenty thousand, six hundred thirty-five".