42049705 has 4 divisors (see below), whose sum is σ = 50459652. Its totient is φ = 33639760.

The previous prime is 42049703. The next prime is 42049747. The reversal of 42049705 is 50794024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4460544 + 37589161 = 2112^2 + 6131^2 .

It is not a de Polignac number, because 42049705 - 2¹ = 42049703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42049703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4204966 + ... + 4204975.

It is an arithmetic number, because the mean of its divisors is an integer number (12614913).

Almost surely, 2^42049705 is an apocalyptic number.

It is an amenable number.

42049705 is a deficient number, since it is larger than the sum of its proper divisors (8409947).

42049705 is an equidigital number, since it uses as much as digits as its factorization.

42049705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8409946.

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

The square root of 42049705 is about 6484.5743885008. The cubic root of 42049705 is about 347.7397341647.

The spelling of 42049705 in words is "forty-two million, forty-nine thousand, seven hundred five".