647271 has 20 divisors (see below), whose sum is σ = 990264. Its totient is φ = 421200.

The previous prime is 647263. The next prime is 647293. The reversal of 647271 is 172746.

647271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 647271 - 2³ = 647263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647271.

It is not an unprimeable number, because it can be changed into a prime (647201) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4876 + ... + 5006.

2⁶⁴⁷²⁷¹ is an apocalyptic number.

647271 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

647271 is a deficient number, since it is larger than the sum of its proper divisors (342993).

647271 is a wasteful number, since it uses less digits than its factorization.

647271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 195 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 647271 is about 804.5315407117. The cubic root of 647271 is about 86.5025114265.

The spelling of 647271 in words is "six hundred forty-seven thousand, two hundred seventy-one".