1020866 has 24 divisors (see below), whose sum is σ = 1945296. Its totient is φ = 397320.

The previous prime is 1020853. The next prime is 1020881. The reversal of 1020866 is 6680201.

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 11 ways as a sum of consecutive naturals, for example, 605 + ... + 1551.

It is an arithmetic number, because the mean of its divisors is an integer number (81054).

2^1020866 is an apocalyptic number.

1020866 is a deficient number, since it is larger than the sum of its proper divisors (924430).

1020866 is a wasteful number, since it uses less digits than its factorization.

1020866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1020866 is about 1010.3791367601. The cubic root of 1020866 is about 100.6907509781.

The spelling of 1020866 in words is "one million, twenty thousand, eight hundred sixty-six".