42663305 has 8 divisors (see below), whose sum is σ = 51457032. Its totient is φ = 33956608.

The previous prime is 42663301. The next prime is 42663311. The reversal of 42663305 is 50336624.

It can be written as a sum of positive squares in 4 ways, for example, as 30294016 + 12369289 = 5504^2 + 3517^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42663305 - 2² = 42663301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42663301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20672 + ... + 22641.

It is an arithmetic number, because the mean of its divisors is an integer number (6432129).

Almost surely, 2^42663305 is an apocalyptic number.

It is an amenable number.

42663305 is a deficient number, since it is larger than the sum of its proper divisors (8793727).

42663305 is a wasteful number, since it uses less digits than its factorization.

42663305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43515.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 42663305 is about 6531.7153183524. The cubic root of 42663305 is about 349.4230085087.

Adding to 42663305 its reverse (50336624), we get a palindrome (92999929).

The spelling of 42663305 in words is "forty-two million, six hundred sixty-three thousand, three hundred five".