1020566 has 16 divisors (see below), whose sum is σ = 1632960. Its totient is φ = 477000.

The previous prime is 1020557. The next prime is 1020583. The reversal of 1020566 is 6650201.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3941 + ... + 4191.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2^1020566 is an apocalyptic number.

1020566 is a deficient number, since it is larger than the sum of its proper divisors (612394).

1020566 is a wasteful number, since it uses less digits than its factorization.

1020566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1020566 is about 1010.2306667291. The cubic root of 1020566 is about 100.6808867436.

Adding to 1020566 its reverse (6650201), we get a palindrome (7670767).

The spelling of 1020566 in words is "one million, twenty thousand, five hundred sixty-six".