78271 has 4 divisors (see below), whose sum is σ = 81000. Its totient is φ = 75544.

The previous prime is 78259. The next prime is 78277. The reversal of 78271 is 17287.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17287 = 59 ⋅293.

It is a cyclic number.

It is not a de Polignac number, because 78271 - 2¹³ = 70079 is a prime.

It is a super-2 number, since 2×78271² = 12252698882, which contains 22 as substring.

It is a Duffinian number.

78271 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321 + ... + 1378.

It is an arithmetic number, because the mean of its divisors is an integer number (20250).

2⁷⁸²⁷¹ is an apocalyptic number.

78271 is a deficient number, since it is larger than the sum of its proper divisors (2729).

78271 is a wasteful number, since it uses less digits than its factorization.

78271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728.

The product of its digits is 784, while the sum is 25.

The square root of 78271 is about 279.7695480212. The cubic root of 78271 is about 42.7760121208.

The spelling of 78271 in words is "seventy-eight thousand, two hundred seventy-one".