271720 has 16 divisors (see below), whose sum is σ = 611460. Its totient is φ = 108672.

The previous prime is 271703. The next prime is 271723. The reversal of 271720 is 27172.

It can be written as a sum of positive squares in 2 ways, for example, as 248004 + 23716 = 498^2 + 154^2 .

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (271723) by changing a digit.

271720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3357 + ... + 3436.

2²⁷¹⁷²⁰ is an apocalyptic number.

271720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

271720 is an abundant number, since it is smaller than the sum of its proper divisors (339740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

271720 is a wasteful number, since it uses less digits than its factorization.

271720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6804 (or 6800 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 271720 is about 521.2676855513. The cubic root of 271720 is about 64.7699957623.

Adding to 271720 its reverse (27172), we get a palindrome (298892).

The spelling of 271720 in words is "two hundred seventy-one thousand, seven hundred twenty", and thus it is an iban number.