42416729 has 2 divisors, whose sum is σ = 42416730. Its totient is φ = 42416728.

The previous prime is 42416713. The next prime is 42416743. The reversal of 42416729 is 92761424.

42416729 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., 39942400 + 2474329 = 6320^2 + 1573^2 .

It is a cyclic number.

It is not a de Polignac number, because 42416729 - 2⁴ = 42416713 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42416779) 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, 21208364 + 21208365.

It is an arithmetic number, because the mean of its divisors is an integer number (21208365).

Almost surely, 2^42416729 is an apocalyptic number.

It is an amenable number.

42416729 is a deficient number, since it is larger than the sum of its proper divisors (1).

42416729 is an equidigital number, since it uses as much as digits as its factorization.

42416729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

The square root of 42416729 is about 6512.8126796339. The cubic root of 42416729 is about 348.7485346564.

The spelling of 42416729 in words is "forty-two million, four hundred sixteen thousand, seven hundred twenty-nine".