42387 has 8 divisors (see below), whose sum is σ = 57600.
Its totient is φ = 27720.
The previous prime is 42379. The next prime is 42391. The reversal of 42387 is 78324.
42387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 42387 - 23 = 42379 is a prime.
It is not an unprimeable number, because it can be changed into a prime (42307) 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, 114 + ... + 312.
It is an arithmetic number, because the mean of its divisors is an integer number (7200).
242387 is an apocalyptic number.
42387 is a deficient number, since it is larger than the sum of its proper divisors (15213).
42387 is a wasteful number, since it uses less digits than its factorization.
42387 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 273.
The product of its digits is 1344, while the sum is 24.
The square root of 42387 is about 205.8810336092.
The cubic root of 42387 is about 34.8667038758.
Subtracting 42387 from its reverse (78324), we obtain a cube (35937 = 333).
The spelling of 42387 in words is "forty-two thousand, three hundred eighty-seven".