42710665 has 4 divisors (see below), whose sum is σ = 51252804. Its totient is φ = 34168528.

The previous prime is 42710663. The next prime is 42710671. The reversal of 42710665 is 56601724.

It is a happy number.

42710665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9659664 + 33051001 = 3108^2 + 5749^2 .

It is a cyclic number.

It is not a de Polignac number, because 42710665 - 2¹ = 42710663 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42710663) 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 in 3 ways as a sum of consecutive naturals, for example, 4271062 + ... + 4271071.

It is an arithmetic number, because the mean of its divisors is an integer number (12813201).

Almost surely, 2^42710665 is an apocalyptic number.

It is an amenable number.

42710665 is a deficient number, since it is larger than the sum of its proper divisors (8542139).

42710665 is an equidigital number, since it uses as much as digits as its factorization.

42710665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8542138.

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

The square root of 42710665 is about 6535.3397004287. The cubic root of 42710665 is about 349.5522573950.

The spelling of 42710665 in words is "forty-two million, seven hundred ten thousand, six hundred sixty-five".