42320749 has 2 divisors, whose sum is σ = 42320750. Its totient is φ = 42320748.

The previous prime is 42320737. The next prime is 42320753. The reversal of 42320749 is 94702324.

42320749 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., 27227524 + 15093225 = 5218^2 + 3885^2 .

It is a cyclic number.

It is not a de Polignac number, because 42320749 - 2⁹ = 42320237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42320749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42320249) 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, 21160374 + 21160375.

It is an arithmetic number, because the mean of its divisors is an integer number (21160375).

Almost surely, 2^42320749 is an apocalyptic number.

It is an amenable number.

42320749 is a deficient number, since it is larger than the sum of its proper divisors (1).

42320749 is an equidigital number, since it uses as much as digits as its factorization.

42320749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 42320749 is about 6505.4399543766. The cubic root of 42320749 is about 348.4852881790.

The spelling of 42320749 in words is "forty-two million, three hundred twenty thousand, seven hundred forty-nine".