1020709 has 2 divisors, whose sum is σ = 1020710. Its totient is φ = 1020708.

The previous prime is 1020707. The next prime is 1020743. The reversal of 1020709 is 9070201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 748225 + 272484 = 865^2 + 522^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020709 - 2¹ = 1020707 is a prime.

Together with 1020707, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020707) 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 as a sum of consecutive naturals, namely, 510354 + 510355.

It is an arithmetic number, because the mean of its divisors is an integer number (510355).

2^1020709 is an apocalyptic number.

It is an amenable number.

1020709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020709 is an equidigital number, since it uses as much as digits as its factorization.

1020709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 1020709 is about 1010.3014401653. The cubic root of 1020709 is about 100.6855889365.

The spelling of 1020709 in words is "one million, twenty thousand, seven hundred nine".