42422665 has 8 divisors (see below), whose sum is σ = 50993928. Its totient is φ = 33880320.

The previous prime is 42422641. The next prime is 42422669. The reversal of 42422665 is 56622424.

It can be written as a sum of positive squares in 4 ways, for example, as 781456 + 41641209 = 884^2 + 6453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-42422665 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42422669) 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 in 7 ways as a sum of consecutive naturals, for example, 3856 + ... + 9985.

It is an arithmetic number, because the mean of its divisors is an integer number (6374241).

Almost surely, 2^42422665 is an apocalyptic number.

It is an amenable number.

42422665 is a deficient number, since it is larger than the sum of its proper divisors (8571263).

42422665 is a wasteful number, since it uses less digits than its factorization.

42422665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14459.

The product of its digits is 23040, while the sum is 31.

The square root of 42422665 is about 6513.2683807747. The cubic root of 42422665 is about 348.7648024104.

The spelling of 42422665 in words is "forty-two million, four hundred twenty-two thousand, six hundred sixty-five".