1020843 has 12 divisors (see below), whose sum is σ = 1529528. Its totient is φ = 680400.

The previous prime is 1020841. The next prime is 1020847. The reversal of 1020843 is 3480201.

It is a happy number.

It is not a de Polignac number, because 1020843 - 2¹ = 1020841 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1858 + ... + 2343.

2^1020843 is an apocalyptic number.

1020843 is a deficient number, since it is larger than the sum of its proper divisors (508685).

1020843 is an frugal number, since it uses more digits than its factorization.

1020843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216 (or 4204 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1020843 is about 1010.3677548299. The cubic root of 1020843 is about 100.6899947885.

The spelling of 1020843 in words is "one million, twenty thousand, eight hundred forty-three".