1085709 has 4 divisors (see below), whose sum is σ = 1447616. Its totient is φ = 723804.

The previous prime is 1085687. The next prime is 1085719. The reversal of 1085709 is 9075801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1085709 - 2⁵ = 1085677 is a prime.

It is a D-number.

It is a Duffinian number.

1085709 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180949 + ... + 180954.

It is an arithmetic number, because the mean of its divisors is an integer number (361904).

2^1085709 is an apocalyptic number.

It is an amenable number.

1085709 is a deficient number, since it is larger than the sum of its proper divisors (361907).

1085709 is an equidigital number, since it uses as much as digits as its factorization.

1085709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361906.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1085709 is about 1041.9736081111. The cubic root of 1085709 is about 102.7790216444.

The spelling of 1085709 in words is "one million, eighty-five thousand, seven hundred nine".