9523561 has 4 divisors (see below), whose sum is σ = 9529812. Its totient is φ = 9517312.

The previous prime is 9523559. The next prime is 9523583. The reversal of 9523561 is 1653259.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 553536 + 8970025 = 744^2 + 2995^2 .

It is a cyclic number.

It is not a de Polignac number, because 9523561 - 2¹ = 9523559 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9523061) 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, 825 + ... + 4441.

It is an arithmetic number, because the mean of its divisors is an integer number (2382453).

Almost surely, 2^9523561 is an apocalyptic number.

It is an amenable number.

9523561 is a deficient number, since it is larger than the sum of its proper divisors (6251).

9523561 is a wasteful number, since it uses less digits than its factorization.

9523561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6250.

The product of its digits is 8100, while the sum is 31.

The square root of 9523561 is about 3086.0267335200. The cubic root of 9523561 is about 211.9661228056.

The spelling of 9523561 in words is "nine million, five hundred twenty-three thousand, five hundred sixty-one".