42757489 has 2 divisors, whose sum is σ = 42757490. Its totient is φ = 42757488.

The previous prime is 42757453. The next prime is 42757531. The reversal of 42757489 is 98475724.

42757489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26956864 + 15800625 = 5192^2 + 3975^2 .

It is a cyclic number.

It is not a de Polignac number, because 42757489 - 2⁷ = 42757361 is a prime.

It is not a weakly prime, because it can be changed into another prime (42757409) 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, 21378744 + 21378745.

It is an arithmetic number, because the mean of its divisors is an integer number (21378745).

Almost surely, 2^42757489 is an apocalyptic number.

It is an amenable number.

42757489 is a deficient number, since it is larger than the sum of its proper divisors (1).

42757489 is an equidigital number, since it uses as much as digits as its factorization.

42757489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 46.

The square root of 42757489 is about 6538.9210883754. The cubic root of 42757489 is about 349.6799496025.

The spelling of 42757489 in words is "forty-two million, seven hundred fifty-seven thousand, four hundred eighty-nine".