47845 has 8 divisors (see below), whose sum is σ = 65664. Its totient is φ = 32784.
The previous prime is 47843. The next prime is 47857. The reversal of 47845 is 54874.
47845 = 112 + 122 + ... + 522.
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 47845 - 21 = 47843 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (47843) 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, 649 + ... + 718.
It is an arithmetic number, because the mean of its divisors is an integer number (8208).
247845 is an apocalyptic number.
It is an amenable number.
47845 is a deficient number, since it is larger than the sum of its proper divisors (17819).
47845 is a wasteful number, since it uses less digits than its factorization.
47845 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1379.
The product of its digits is 4480, while the sum is 28.
The square root of 47845 is about 218.7349994857. The cubic root of 47845 is about 36.3032511058.
Adding to 47845 its product of digits (4480), we get a palindrome (52325).
Subtracting from 47845 its product of digits (4480), we obtain a triangular number (43365 = T294).
The spelling of 47845 in words is "forty-seven thousand, eight hundred forty-five".
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