85645 has 8 divisors (see below), whose sum is σ = 117504. Its totient is φ = 58704.
The previous prime is 85643. The next prime is 85661. The reversal of 85645 is 54658.
85645 = 232 + 242 + ... + 642.
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 85645 - 21 = 85643 is a prime.
It is a super-3 number, since 3×856453 = 1884635189133375, which contains 333 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (85643) 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, 1189 + ... + 1258.
It is an arithmetic number, because the mean of its divisors is an integer number (14688).
285645 is an apocalyptic number.
It is an amenable number.
85645 is a deficient number, since it is larger than the sum of its proper divisors (31859).
85645 is a wasteful number, since it uses less digits than its factorization.
85645 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2459.
The product of its digits is 4800, while the sum is 28.
The square root of 85645 is about 292.6516700790. The cubic root of 85645 is about 44.0792305227.
The spelling of 85645 in words is "eighty-five thousand, six hundred forty-five".
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