9518561 has 4 divisors (see below), whose sum is σ = 10250772. Its totient is φ = 8786352.

The previous prime is 9518549. The next prime is 9518617. The reversal of 9518561 is 1658159.

9518561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3041536 + 6477025 = 1744^2 + 2545^2 .

It is a cyclic number.

It is not a de Polignac number, because 9518561 - 2⁶ = 9518497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9518161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366086 + ... + 366111.

It is an arithmetic number, because the mean of its divisors is an integer number (2562693).

Almost surely, 2^9518561 is an apocalyptic number.

It is an amenable number.

9518561 is a deficient number, since it is larger than the sum of its proper divisors (732211).

9518561 is a wasteful number, since it uses less digits than its factorization.

9518561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732210.

The product of its digits is 10800, while the sum is 35.

The square root of 9518561 is about 3085.2165240061. The cubic root of 9518561 is about 211.9290212724.

The spelling of 9518561 in words is "nine million, five hundred eighteen thousand, five hundred sixty-one".