1020605 has 16 divisors (see below), whose sum is σ = 1292544. Its totient is φ = 772800.

The previous prime is 1020599. The next prime is 1020619. The reversal of 1020605 is 5060201.

It is not a de Polignac number, because 1020605 - 2⁴ = 1020589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020605.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10055 + ... + 10155.

It is an arithmetic number, because the mean of its divisors is an integer number (80784).

2^1020605 is an apocalyptic number.

It is an amenable number.

1020605 is a deficient number, since it is larger than the sum of its proper divisors (271939).

1020605 is a wasteful number, since it uses less digits than its factorization.

1020605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1020605 is about 1010.2499690671. The cubic root of 1020605 is about 100.6821692034.

Adding to 1020605 its reverse (5060201), we get a palindrome (6080806).

The spelling of 1020605 in words is "one million, twenty thousand, six hundred five".