272905 has 4 divisors (see below), whose sum is σ = 327492. Its totient is φ = 218320.

The previous prime is 272903. The next prime is 272911. The reversal of 272905 is 509272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 175561 + 97344 = 419^2 + 312^2 .

It is not a de Polignac number, because 272905 - 2¹ = 272903 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 272905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (272903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27286 + ... + 27295.

It is an arithmetic number, because the mean of its divisors is an integer number (81873).

2²⁷²⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

272905 is a deficient number, since it is larger than the sum of its proper divisors (54587).

272905 is an equidigital number, since it uses as much as digits as its factorization.

272905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54586.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 272905 is about 522.4031010628. The cubic root of 272905 is about 64.8640155122.

The spelling of 272905 in words is "two hundred seventy-two thousand, nine hundred five".