42541 has 4 divisors (see below), whose sum is σ = 44800.
Its totient is φ = 40284.
The previous prime is 42533. The next prime is 42557. The reversal of 42541 is 14524.
It can be divided in two parts, 42 and 541, that multiplied together give a palindrome (22722).
42541 = 382 + 392 + ... + 562.
42541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 42541 - 23 = 42533 is a prime.
It is a Duffinian 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 (42571) 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, 1101 + ... + 1138.
It is an arithmetic number, because the mean of its divisors is an integer number (11200).
242541 is an apocalyptic number.
It is an amenable number.
42541 is a deficient number, since it is larger than the sum of its proper divisors (2259).
42541 is a wasteful number, since it uses less digits than its factorization.
42541 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2258.
The product of its digits is 160, while the sum is 16.
The square root of 42541 is about 206.2546969162.
The cubic root of 42541 is about 34.9088786205.
The spelling of 42541 in words is "forty-two thousand, five hundred forty-one".