1085691 has 8 divisors (see below), whose sum is σ = 1486864. Its totient is φ = 704160.

The previous prime is 1085687. The next prime is 1085719. The reversal of 1085691 is 1965801.

It is a happy number.

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

It is not a de Polignac number, because 1085691 - 2² = 1085687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4780 + ... + 5001.

It is an arithmetic number, because the mean of its divisors is an integer number (185858).

2^1085691 is an apocalyptic number.

1085691 is a deficient number, since it is larger than the sum of its proper divisors (401173).

1085691 is an equidigital number, since it uses as much as digits as its factorization.

1085691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9821.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 1085691 is about 1041.9649706204. The cubic root of 1085691 is about 102.7784536492.

The spelling of 1085691 in words is "one million, eighty-five thousand, six hundred ninety-one".