1085661 has 12 divisors (see below), whose sum is σ = 1591200. Its totient is φ = 713160.

The previous prime is 1085657. The next prime is 1085663. The reversal of 1085661 is 1665801.

It is not a de Polignac number, because 1085661 - 2² = 1085657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211 + ... + 1488.

It is an arithmetic number, because the mean of its divisors is an integer number (132600).

2^1085661 is an apocalyptic number.

It is an amenable number.

1085661 is a deficient number, since it is larger than the sum of its proper divisors (505539).

1085661 is a wasteful number, since it uses less digits than its factorization.

1085661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776 (or 1773 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1085661 is about 1041.9505746435. The cubic root of 1085661 is about 102.7775069765. Note that the first 3 decimals are identical.

The spelling of 1085661 in words is "one million, eighty-five thousand, six hundred sixty-one".