42663291 has 16 divisors (see below), whose sum is σ = 62270208. Its totient is φ = 25767200.

The previous prime is 42663289. The next prime is 42663301. The reversal of 42663291 is 19236624.

It is a cyclic number.

It is not a de Polignac number, because 42663291 - 2¹ = 42663289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (42663211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8185 + ... + 12341.

It is an arithmetic number, because the mean of its divisors is an integer number (3891888).

Almost surely, 2^42663291 is an apocalyptic number.

42663291 is a deficient number, since it is larger than the sum of its proper divisors (19606917).

42663291 is a wasteful number, since it uses less digits than its factorization.

42663291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482.

The product of its digits is 15552, while the sum is 33.

The square root of 42663291 is about 6531.7142466584. The cubic root of 42663291 is about 349.4229702876.

It can be divided in two parts, 4266 and 3291, that added together give a palindrome (7557).

The spelling of 42663291 in words is "forty-two million, six hundred sixty-three thousand, two hundred ninety-one".