42705049 has 2 divisors, whose sum is σ = 42705050. Its totient is φ = 42705048.

The previous prime is 42705029. The next prime is 42705053. The reversal of 42705049 is 94050724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42667024 + 38025 = 6532^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 42705049 - 2⁵ = 42705017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42705049.

It is not a weakly prime, because it can be changed into another prime (42705029) 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, 21352524 + 21352525.

It is an arithmetic number, because the mean of its divisors is an integer number (21352525).

Almost surely, 2^42705049 is an apocalyptic number.

It is an amenable number.

42705049 is a deficient number, since it is larger than the sum of its proper divisors (1).

42705049 is an equidigital number, since it uses as much as digits as its factorization.

42705049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 42705049 is about 6534.9100223339. The cubic root of 42705049 is about 349.5369359171.

The spelling of 42705049 in words is "forty-two million, seven hundred five thousand, forty-nine".