8097561 has 12 divisors (see below), whose sum is σ = 12013092. Its totient is φ = 5252256.

The previous prime is 8097539. The next prime is 8097571. The reversal of 8097561 is 1657908.

8097561 is a `hidden beast` number, since 8 + 0 + 97 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6471936 + 1625625 = 2544^2 + 1275^2 .

It is not a de Polignac number, because 8097561 - 2¹³ = 8089369 is a prime.

8097561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8097521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11826 + ... + 12491.

It is an arithmetic number, because the mean of its divisors is an integer number (1001091).

Almost surely, 2^8097561 is an apocalyptic number.

It is an amenable number.

8097561 is a deficient number, since it is larger than the sum of its proper divisors (3915531).

8097561 is a wasteful number, since it uses less digits than its factorization.

8097561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24360 (or 24357 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 8097561 is about 2845.6213732681. The cubic root of 8097561 is about 200.8097256312.

The spelling of 8097561 in words is "eight million, ninety-seven thousand, five hundred sixty-one".