271985 has 16 divisors (see below), whose sum is σ = 393600. Its totient is φ = 176256.

The previous prime is 271981. The next prime is 272003. The reversal of 271985 is 589172.

It is a cyclic number.

It is not a de Polignac number, because 271985 - 2² = 271981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (271981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461 + ... + 869.

It is an arithmetic number, because the mean of its divisors is an integer number (24600).

2²⁷¹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

271985 is a deficient number, since it is larger than the sum of its proper divisors (121615).

271985 is a wasteful number, since it uses less digits than its factorization.

271985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440.

The product of its digits is 5040, while the sum is 32.

The square root of 271985 is about 521.5218116244. The cubic root of 271985 is about 64.7910449699.

Subtracting from 271985 its sum of digits (32), we obtain a triangular number (271953 = T₇₃₇).

The spelling of 271985 in words is "two hundred seventy-one thousand, nine hundred eighty-five".