42845749 has 2 divisors, whose sum is σ = 42845750. Its totient is φ = 42845748.

The previous prime is 42845743. The next prime is 42845753. The reversal of 42845749 is 94754824.

42845749 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., 37638225 + 5207524 = 6135^2 + 2282^2 .

It is a cyclic number.

It is not a de Polignac number, because 42845749 - 2⁹ = 42845237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42845743) 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, 21422874 + 21422875.

It is an arithmetic number, because the mean of its divisors is an integer number (21422875).

Almost surely, 2^42845749 is an apocalyptic number.

It is an amenable number.

42845749 is a deficient number, since it is larger than the sum of its proper divisors (1).

42845749 is an equidigital number, since it uses as much as digits as its factorization.

42845749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 43.

The square root of 42845749 is about 6545.6664290200. Note that the first 3 decimals coincide. The cubic root of 42845749 is about 349.9203873345.

The spelling of 42845749 in words is "forty-two million, eight hundred forty-five thousand, seven hundred forty-nine".