9168561 has 6 divisors (see below), whose sum is σ = 13243490. Its totient is φ = 6112368.

The previous prime is 9168557. The next prime is 9168571. The reversal of 9168561 is 1658619.

9168561 is a `hidden beast` number, since 91 + 6 + 8 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6426225 + 2742336 = 2535^2 + 1656^2 .

It is not a de Polignac number, because 9168561 - 2² = 9168557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9168521) 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 5 ways as a sum of consecutive naturals, for example, 509356 + ... + 509373.

Almost surely, 2^9168561 is an apocalyptic number.

It is an amenable number.

9168561 is a deficient number, since it is larger than the sum of its proper divisors (4074929).

9168561 is a wasteful number, since it uses less digits than its factorization.

9168561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018735 (or 1018732 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 9168561 is about 3027.9631767906. The cubic root of 9168561 is about 209.2989548148.

The spelling of 9168561 in words is "nine million, one hundred sixty-eight thousand, five hundred sixty-one".