42663 has 4 divisors (see below), whose sum is σ = 56888. Its totient is φ = 28440.

The previous prime is 42649. The next prime is 42667. The reversal of 42663 is 36624.

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

It is not a de Polignac number, because 42663 - 2⁸ = 42407 is a prime.

It is a D-number.

It is a Duffinian number.

42663 is a lucky number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42667) 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, 7108 + ... + 7113.

It is an arithmetic number, because the mean of its divisors is an integer number (14222).

2⁴²⁶⁶³ is an apocalyptic number.

42663 is a deficient number, since it is larger than the sum of its proper divisors (14225).

42663 is a wasteful number, since it uses less digits than its factorization.

42663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14224.

The product of its digits is 864, while the sum is 21.

The square root of 42663 is about 206.5502360202. The cubic root of 42663 is about 34.9422175832.

The spelling of 42663 in words is "forty-two thousand, six hundred sixty-three".