135171 has 12 divisors (see below), whose sum is σ = 204048. Its totient is φ = 86064.
The previous prime is 135151. The next prime is 135173. The reversal of 135171 is 171531.
It is a happy number.
It is not a de Polignac number, because 135171 - 27 = 135043 is a prime.
It is not an unprimeable number, because it can be changed into a prime (135173) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120 + ... + 533.
It is an arithmetic number, because the mean of its divisors is an integer number (17004).
2135171 is an apocalyptic number.
135171 is a deficient number, since it is larger than the sum of its proper divisors (68877).
135171 is a wasteful number, since it uses less digits than its factorization.
135171 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 682 (or 679 counting only the distinct ones).
The product of its digits is 105, while the sum is 18.
The square root of 135171 is about 367.6560893009. The cubic root of 135171 is about 51.3209289569.
It can be divided in two parts, 13 and 5171, that added together give a square (5184 = 722).
The spelling of 135171 in words is "one hundred thirty-five thousand, one hundred seventy-one".
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