42559 has 8 divisors (see below), whose sum is σ = 47952.
Its totient is φ = 37440.
The previous prime is 42557. The next prime is 42569. The reversal of 42559 is 95524.
It can be divided in two parts, 425 and 59, that added together give a palindrome (484).
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 42559 - 21 = 42557 is a prime.
It is a super-2 number, since 2×425592 = 3622536962, which contains 22 as substring.
It is an Ulam number.
It is a Duffinian number.
42559 is a lucky number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (42557) 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, 547 + ... + 619.
It is an arithmetic number, because the mean of its divisors is an integer number (5994).
242559 is an apocalyptic number.
42559 is a deficient number, since it is larger than the sum of its proper divisors (5393).
42559 is a wasteful number, since it uses less digits than its factorization.
42559 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 137.
The product of its digits is 1800, while the sum is 25.
The square root of 42559 is about 206.2983276714.
The cubic root of 42559 is about 34.9138014888.
The spelling of 42559 in words is "forty-two thousand, five hundred fifty-nine".