1089705 has 8 divisors (see below), whose sum is σ = 1743552. Its totient is φ = 581168.

The previous prime is 1089703. The next prime is 1089709. The reversal of 1089705 is 5079801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1089705 - 2¹ = 1089703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1089703) 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 7 ways as a sum of consecutive naturals, for example, 36309 + ... + 36338.

It is an arithmetic number, because the mean of its divisors is an integer number (217944).

2^1089705 is an apocalyptic number.

1089705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1089705 is a deficient number, since it is larger than the sum of its proper divisors (653847).

1089705 is an equidigital number, since it uses as much as digits as its factorization.

1089705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72655.

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

The square root of 1089705 is about 1043.8893619537. The cubic root of 1089705 is about 102.9049615067.

The spelling of 1089705 in words is "one million, eighty-nine thousand, seven hundred five".