1086561 has 16 divisors (see below), whose sum is σ = 1840000. Its totient is φ = 620784.

The previous prime is 1086559. The next prime is 1086587. The reversal of 1086561 is 1656801.

1086561 is a `hidden beast` number, since 1 + 0 + 8 + 656 + 1 = 666.

It is not a de Polignac number, because 1086561 - 2¹ = 1086559 is a prime.

It is a super-2 number, since 2×1086561² = 2361229613442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1086511) 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 15 ways as a sum of consecutive naturals, for example, 2686 + ... + 3063.

It is an arithmetic number, because the mean of its divisors is an integer number (115000).

2^1086561 is an apocalyptic number.

It is an amenable number.

1086561 is a deficient number, since it is larger than the sum of its proper divisors (753439).

1086561 is an equidigital number, since it uses as much as digits as its factorization.

1086561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5765 (or 5759 counting only the distinct ones).

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

The square root of 1086561 is about 1042.3823674641. The cubic root of 1086561 is about 102.8058995741.

The spelling of 1086561 in words is "one million, eighty-six thousand, five hundred sixty-one".