122530561 has 2 divisors, whose sum is σ = 122530562. Its totient is φ = 122530560.

The previous prime is 122530559. The next prime is 122530619. The reversal of 122530561 is 165035221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97219600 + 25310961 = 9860^2 + 5031^2 .

It is a cyclic number.

It is not a de Polignac number, because 122530561 - 2¹ = 122530559 is a prime.

Together with 122530559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (122534561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61265280 + 61265281.

It is an arithmetic number, because the mean of its divisors is an integer number (61265281).

Almost surely, 2^122530561 is an apocalyptic number.

It is an amenable number.

122530561 is a deficient number, since it is larger than the sum of its proper divisors (1).

122530561 is an equidigital number, since it uses as much as digits as its factorization.

122530561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 122530561 is about 11069.3523297436. The cubic root of 122530561 is about 496.6854912814.

Adding to 122530561 its reverse (165035221), we get a palindrome (287565782).

The spelling of 122530561 in words is "one hundred twenty-two million, five hundred thirty thousand, five hundred sixty-one".