42524561 has 2 divisors, whose sum is σ = 42524562. Its totient is φ = 42524560.

The previous prime is 42524543. The next prime is 42524567. The reversal of 42524561 is 16542524.

42524561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42510400 + 14161 = 6520^2 + 119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42524561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42524567) 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, 21262280 + 21262281.

It is an arithmetic number, because the mean of its divisors is an integer number (21262281).

Almost surely, 2^42524561 is an apocalyptic number.

It is an amenable number.

42524561 is a deficient number, since it is larger than the sum of its proper divisors (1).

42524561 is an equidigital number, since it uses as much as digits as its factorization.

42524561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 29.

The square root of 42524561 is about 6521.0858758339. The cubic root of 42524561 is about 349.0438146101.

The spelling of 42524561 in words is "forty-two million, five hundred twenty-four thousand, five hundred sixty-one".