71278 has 8 divisors (see below), whose sum is σ = 108072. Its totient is φ = 35256.

The previous prime is 71263. The next prime is 71287. The reversal of 71278 is 87217.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201 + ... + 427.

It is an arithmetic number, because the mean of its divisors is an integer number (13509).

2⁷¹²⁷⁸ is an apocalyptic number.

71278 is a deficient number, since it is larger than the sum of its proper divisors (36794).

71278 is a wasteful number, since it uses less digits than its factorization.

71278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386.

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

The square root of 71278 is about 266.9793999544. The cubic root of 71278 is about 41.4621515861.

Subtracting from 71278 its sum of digits (25), we obtain a triangular number (71253 = T₃₇₇).

The spelling of 71278 in words is "seventy-one thousand, two hundred seventy-eight".