1020806 has 4 divisors (see below), whose sum is σ = 1531212. Its totient is φ = 510402.

The previous prime is 1020797. The next prime is 1020821. The reversal of 1020806 is 6080201.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 255200 + ... + 255203.

It is an arithmetic number, because the mean of its divisors is an integer number (382803).

2^1020806 is an apocalyptic number.

1020806 is a deficient number, since it is larger than the sum of its proper divisors (510406).

1020806 is an equidigital number, since it uses as much as digits as its factorization.

1020806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510405.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1020806 is about 1010.3494444993. The cubic root of 1020806 is about 100.6887782858.

The spelling of 1020806 in words is "one million, twenty thousand, eight hundred six".