1020217 has 8 divisors (see below), whose sum is σ = 1121760. Its totient is φ = 920160.

The previous prime is 1020163. The next prime is 1020223. The reversal of 1020217 is 7120201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020217 is a prime.

It is a super-3 number, since 3×1020217³ = 3185656333507674939, which contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020197 and 1020206.

It is not an unprimeable number, because it can be changed into a prime (1020247) 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 7 ways as a sum of consecutive naturals, for example, 1509 + ... + 2077.

It is an arithmetic number, because the mean of its divisors is an integer number (140220).

2^1020217 is an apocalyptic number.

It is an amenable number.

1020217 is a deficient number, since it is larger than the sum of its proper divisors (101543).

1020217 is a wasteful number, since it uses less digits than its factorization.

1020217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 1020217 is about 1010.0579191314. The cubic root of 1020217 is about 100.6694089181.

Adding to 1020217 its reverse (7120201), we get a palindrome (8140418).

The spelling of 1020217 in words is "one million, twenty thousand, two hundred seventeen".