1085309 has 2 divisors, whose sum is σ = 1085310. Its totient is φ = 1085308.

The previous prime is 1085269. The next prime is 1085317. The reversal of 1085309 is 9035801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 850084 + 235225 = 922^2 + 485^2 .

It is an emirp because it is prime and its reverse (9035801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1085309 - 2⁸ = 1085053 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542654 + 542655.

It is an arithmetic number, because the mean of its divisors is an integer number (542655).

2^1085309 is an apocalyptic number.

It is an amenable number.

1085309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085309 is an equidigital number, since it uses as much as digits as its factorization.

1085309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1085309 is about 1041.7816469875. The cubic root of 1085309 is about 102.7663980475.

The spelling of 1085309 in words is "one million, eighty-five thousand, three hundred nine".