1086665 has 4 divisors (see below), whose sum is σ = 1304004. Its totient is φ = 869328.

The previous prime is 1086647. The next prime is 1086677. The reversal of 1086665 is 5666801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 687241 + 399424 = 829^2 + 632^2 .

It is a cyclic number.

It is not a de Polignac number, because 1086665 - 2¹⁶ = 1021129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108662 + ... + 108671.

It is an arithmetic number, because the mean of its divisors is an integer number (326001).

2^1086665 is an apocalyptic number.

It is an amenable number.

1086665 is a deficient number, since it is larger than the sum of its proper divisors (217339).

1086665 is an equidigital number, since it uses as much as digits as its factorization.

1086665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217338.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1086665 is about 1042.4322519953. The cubic root of 1086665 is about 102.8091794858.

The spelling of 1086665 in words is "one million, eighty-six thousand, six hundred sixty-five".