1086691 has 8 divisors (see below), whose sum is σ = 1164240. Its totient is φ = 1010688.

The previous prime is 1086689. The next prime is 1086703. The reversal of 1086691 is 1966801.

It is a happy number.

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 1086691 - 2¹ = 1086689 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1086611) 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, 1320 + ... + 1978.

It is an arithmetic number, because the mean of its divisors is an integer number (145530).

2^1086691 is an apocalyptic number.

1086691 is a deficient number, since it is larger than the sum of its proper divisors (77549).

1086691 is an equidigital number, since it uses as much as digits as its factorization.

1086691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1086691 is about 1042.4447227551. Note that the first 3 decimals coincide. The cubic root of 1086691 is about 102.8099994311.

The spelling of 1086691 in words is "one million, eighty-six thousand, six hundred ninety-one".