71273 has 4 divisors (see below), whose sum is σ = 71808. Its totient is φ = 70740.
The previous prime is 71263. The next prime is 71287. The reversal of 71273 is 37217.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.
It is a cyclic number.
It is not a de Polignac number, because 71273 - 24 = 71257 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is a plaindrome in base 16.
It is not an unprimeable number, because it can be changed into a prime (71233) 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, 128 + ... + 398.
It is an arithmetic number, because the mean of its divisors is an integer number (17952).
271273 is an apocalyptic number.
It is an amenable number.
71273 is a deficient number, since it is larger than the sum of its proper divisors (535).
71273 is a wasteful number, since it uses less digits than its factorization.
71273 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 534.
The product of its digits is 294, while the sum is 20.
The square root of 71273 is about 266.9700357718. The cubic root of 71273 is about 41.4611820696.
Subtracting from 71273 its sum of digits (20), we obtain a triangular number (71253 = T377).
It can be divided in two parts, 7 and 1273, that multiplied together give a triangular number (8911 = T133).
The spelling of 71273 in words is "seventy-one thousand, two hundred seventy-three", and thus it is an iban number.
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