42423999 has 8 divisors (see below), whose sum is σ = 57084720. Its totient is φ = 28022976.

The previous prime is 42423977. The next prime is 42424001. The reversal of 42423999 is 99932424.

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

It is not a de Polignac number, because 42423999 - 2⁵ = 42423967 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 42423999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42427999) 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, 64542 + ... + 65195.

It is an arithmetic number, because the mean of its divisors is an integer number (7135590).

Almost surely, 2^42423999 is an apocalyptic number.

42423999 is a deficient number, since it is larger than the sum of its proper divisors (14660721).

42423999 is a wasteful number, since it uses less digits than its factorization.

42423999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129849.

The product of its digits is 139968, while the sum is 42.

The square root of 42423999 is about 6513.3707863133. The cubic root of 42423999 is about 348.7684580614.

The spelling of 42423999 in words is "forty-two million, four hundred twenty-three thousand, nine hundred ninety-nine".