42068549 has 2 divisors, whose sum is σ = 42068550. Its totient is φ = 42068548.

The previous prime is 42068503. The next prime is 42068561. The reversal of 42068549 is 94586024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37149025 + 4919524 = 6095^2 + 2218^2 .

It is a cyclic number.

It is not a de Polignac number, because 42068549 - 2⁸ = 42068293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42068249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21034274 + 21034275.

It is an arithmetic number, because the mean of its divisors is an integer number (21034275).

Almost surely, 2^42068549 is an apocalyptic number.

It is an amenable number.

42068549 is a deficient number, since it is larger than the sum of its proper divisors (1).

42068549 is an equidigital number, since it uses as much as digits as its factorization.

42068549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 42068549 is about 6486.0272124005. The cubic root of 42068549 is about 347.7916713419.

The spelling of 42068549 in words is "forty-two million, sixty-eight thousand, five hundred forty-nine".