71279 has 4 divisors (see below), whose sum is σ = 76776. Its totient is φ = 65784.

The previous prime is 71263. The next prime is 71287. The reversal of 71279 is 97217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97217 = 67 ⋅1451.

It is a cyclic number.

It is not a de Polignac number, because 71279 - 2⁴ = 71263 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71209) 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, 2729 + ... + 2754.

It is an arithmetic number, because the mean of its divisors is an integer number (19194).

2⁷¹²⁷⁹ is an apocalyptic number.

71279 is a deficient number, since it is larger than the sum of its proper divisors (5497).

71279 is a wasteful number, since it uses less digits than its factorization.

71279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5496.

The product of its digits is 882, while the sum is 26.

The square root of 71279 is about 266.9812727515. The cubic root of 71279 is about 41.4623454840.

Subtracting from 71279 its sum of digits (26), we obtain a triangular number (71253 = T₃₇₇).

The spelling of 71279 in words is "seventy-one thousand, two hundred seventy-nine".