1020817 has 12 divisors (see below), whose sum is σ = 1206576. Its totient is φ = 861000.

The previous prime is 1020797. The next prime is 1020821. The reversal of 1020817 is 7180201.

It is not a de Polignac number, because 1020817 - 2⁷ = 1020689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020794 and 1020803.

It is not an unprimeable number, because it can be changed into a prime (1020827) by changing a digit.

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, 3942 + ... + 4192.

It is an arithmetic number, because the mean of its divisors is an integer number (100548).

2^1020817 is an apocalyptic number.

It is an amenable number.

1020817 is a deficient number, since it is larger than the sum of its proper divisors (185759).

1020817 is an equidigital number, since it uses as much as digits as its factorization.

1020817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 1020817 is about 1010.3548881457. The cubic root of 1020817 is about 100.6891399519.

The spelling of 1020817 in words is "one million, twenty thousand, eight hundred seventeen".