42403549 has 2 divisors, whose sum is σ = 42403550. Its totient is φ = 42403548.

The previous prime is 42403531. The next prime is 42403561. The reversal of 42403549 is 94530424.

It is a happy number.

42403549 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., 42341049 + 62500 = 6507^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 42403549 - 2⁹ = 42403037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42403549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42403519) 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, 21201774 + 21201775.

It is an arithmetic number, because the mean of its divisors is an integer number (21201775).

Almost surely, 2^42403549 is an apocalyptic number.

It is an amenable number.

42403549 is a deficient number, since it is larger than the sum of its proper divisors (1).

42403549 is an equidigital number, since it uses as much as digits as its factorization.

42403549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 42403549 is about 6511.8007494087. The cubic root of 42403549 is about 348.7124091153.

The spelling of 42403549 in words is "forty-two million, four hundred three thousand, five hundred forty-nine".