1085389 has 2 divisors, whose sum is σ = 1085390. Its totient is φ = 1085388.

The previous prime is 1085369. The next prime is 1085407. The reversal of 1085389 is 9835801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 887364 + 198025 = 942^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 1085389 - 2¹⁹ = 561101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085309) 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, 542694 + 542695.

It is an arithmetic number, because the mean of its divisors is an integer number (542695).

2^1085389 is an apocalyptic number.

It is an amenable number.

1085389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085389 is an equidigital number, since it uses as much as digits as its factorization.

1085389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 1085389 is about 1041.8200420418. The cubic root of 1085389 is about 102.7689230150.

The spelling of 1085389 in words is "one million, eighty-five thousand, three hundred eighty-nine".