104240 has 20 divisors (see below), whose sum is σ = 242544. Its totient is φ = 41664.
The previous prime is 104239. The next prime is 104243. The reversal of 104240 is 42401.
It is a tau number, because it is divible by the number of its divisors (20).
It is not an unprimeable number, because it can be changed into a prime (104243) 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, 572 + ... + 731.
2104240 is an apocalyptic number.
104240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
104240 is an abundant number, since it is smaller than the sum of its proper divisors (138304).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
104240 is a wasteful number, since it uses less digits than its factorization.
104240 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1316 (or 1310 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 11.
The square root of 104240 is about 322.8621997076. The cubic root of 104240 is about 47.0628403434.
Adding to 104240 its reverse (42401), we get a palindrome (146641).
The spelling of 104240 in words is "one hundred four thousand, two hundred forty", and thus it is an iban number.
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