117645 has 32 divisors (see below), whose sum is σ = 221184. Its totient is φ = 52800.
The previous prime is 117643. The next prime is 117659. The reversal of 117645 is 546711.
117645 is nontrivially palindromic in base 4.
It is not a de Polignac number, because 117645 - 21 = 117643 is a prime.
It is a super-3 number, since 3×1176453 = 4884742524333375, which contains 333 as substring.
117645 is a lucky number.
It is a nialpdrome in base 7.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (117643) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3780 + ... + 3810.
It is an arithmetic number, because the mean of its divisors is an integer number (6912).
117645 is a Friedman number, since it can be written as 7^6-5+(1*1)^4, using all its digits and the basic arithmetic operations.
2117645 is an apocalyptic number.
117645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
It is an amenable number.
117645 is a deficient number, since it is larger than the sum of its proper divisors (103539).
117645 is a wasteful number, since it uses less digits than its factorization.
117645 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 73.
The product of its digits is 840, while the sum is 24.
The square root of 117645 is about 342.9941690466. The cubic root of 117645 is about 48.9994446695. Note that the first 3 decimals are identical.
It can be divided in two parts, 1176 and 45, that added together give a palindrome (1221).
The spelling of 117645 in words is "one hundred seventeen thousand, six hundred forty-five".
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