71278471 has 16 divisors (see below), whose sum is σ = 79063200. Its totient is φ = 63722880.

The previous prime is 71278463. The next prime is 71278483. The reversal of 71278471 is 17487217.

It is a cyclic number.

It is not a de Polignac number, because 71278471 - 2³ = 71278463 is a prime.

It is a super-3 number, since 3×71278471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71278471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71278411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257185 + ... + 257461.

It is an arithmetic number, because the mean of its divisors is an integer number (4941450).

Almost surely, 2^71278471 is an apocalyptic number.

71278471 is a deficient number, since it is larger than the sum of its proper divisors (7784729).

71278471 is a wasteful number, since it uses less digits than its factorization.

71278471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594.

The product of its digits is 21952, while the sum is 37.

The square root of 71278471 is about 8442.6578161145. The cubic root of 71278471 is about 414.6224291226.

The spelling of 71278471 in words is "seventy-one million, two hundred seventy-eight thousand, four hundred seventy-one".