130786561 has 4 divisors (see below), whose sum is σ = 130839300. Its totient is φ = 130733824.

The previous prime is 130786553. The next prime is 130786567. The reversal of 130786561 is 165687031.

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 101626561 + 29160000 = 10081^2 + 5400^2 .

It is a cyclic number.

It is not a de Polignac number, because 130786561 - 2³ = 130786553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 130786561.

It is not an unprimeable number, because it can be changed into a prime (130786567) 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, 22456 + ... + 27673.

It is an arithmetic number, because the mean of its divisors is an integer number (32709825).

Almost surely, 2^130786561 is an apocalyptic number.

It is an amenable number.

130786561 is a deficient number, since it is larger than the sum of its proper divisors (52739).

130786561 is an equidigital number, since it uses as much as digits as its factorization.

130786561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52738.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 130786561 is about 11436.1952151929. The cubic root of 130786561 is about 507.5993298906.

The spelling of 130786561 in words is "one hundred thirty million, seven hundred eighty-six thousand, five hundred sixty-one".