2086561 has 4 divisors (see below), whose sum is σ = 2196400. Its totient is φ = 1976724.

The previous prime is 2086549. The next prime is 2086571. The reversal of 2086561 is 1656802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2086561 - 2⁷ = 2086433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2086501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54891 + ... + 54928.

It is an arithmetic number, because the mean of its divisors is an integer number (549100).

2^2086561 is an apocalyptic number.

It is an amenable number.

2086561 is a deficient number, since it is larger than the sum of its proper divisors (109839).

2086561 is a wasteful number, since it uses less digits than its factorization.

2086561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109838.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2086561 is about 1444.4933367794. The cubic root of 2086561 is about 127.7841618038.

The spelling of 2086561 in words is "two million, eighty-six thousand, five hundred sixty-one".