9506561 has 4 divisors (see below), whose sum is σ = 9514032. Its totient is φ = 9499092.

The previous prime is 9506543. The next prime is 9506597. The reversal of 9506561 is 1656059.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9506561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9506501) 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, 1295 + ... + 4548.

It is an arithmetic number, because the mean of its divisors is an integer number (2378508).

Almost surely, 2^9506561 is an apocalyptic number.

It is an amenable number.

9506561 is a deficient number, since it is larger than the sum of its proper divisors (7471).

9506561 is a wasteful number, since it uses less digits than its factorization.

9506561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7470.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 9506561 is about 3083.2711525262. The cubic root of 9506561 is about 211.8399245516.

The spelling of 9506561 in words is "nine million, five hundred six thousand, five hundred sixty-one".