9620561 has 2 divisors, whose sum is σ = 9620562. Its totient is φ = 9620560.

The previous prime is 9620543. The next prime is 9620563. The reversal of 9620561 is 1650269.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5290000 + 4330561 = 2300^2 + 2081^2 .

It is a cyclic number.

It is not a de Polignac number, because 9620561 - 2⁶ = 9620497 is a prime.

Together with 9620563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9620563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4810280 + 4810281.

It is an arithmetic number, because the mean of its divisors is an integer number (4810281).

Almost surely, 2^9620561 is an apocalyptic number.

It is an amenable number.

9620561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9620561 is an equidigital number, since it uses as much as digits as its factorization.

9620561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 9620561 is about 3101.7029193654. The cubic root of 9620561 is about 212.6833370492.

The spelling of 9620561 in words is "nine million, six hundred twenty thousand, five hundred sixty-one".