120084561 has 6 divisors (see below), whose sum is σ = 173455490. Its totient is φ = 80056368.

The previous prime is 120084557. The next prime is 120084571. The reversal of 120084561 is 165480021.

120084561 is a `hidden beast` number, since 1 + 20 + 0 + 84 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 120033936 + 50625 = 10956^2 + 225^2 .

It is not a de Polignac number, because 120084561 - 2² = 120084557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120084511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6671356 + ... + 6671373.

Almost surely, 2^120084561 is an apocalyptic number.

It is an amenable number.

120084561 is a deficient number, since it is larger than the sum of its proper divisors (53370929).

120084561 is a wasteful number, since it uses less digits than its factorization.

120084561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13342735 (or 13342732 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 120084561 is about 10958.3101343227. The cubic root of 120084561 is about 493.3582461954.

The spelling of 120084561 in words is "one hundred twenty million, eighty-four thousand, five hundred sixty-one".